One model is misdiagnosis. Ten is understanding. A hundred is judgment.
New · Diagnostic
Nine questions. You'll learn which three models you already lean on, how you approach problems, and how to use them to design the right incentives.
The catalog below is the library. These four lessons teach how a senior operator actually wields a model in a live room. Hover any underlined term to see the definition.
Skinner is running your weekly leadership meeting whether you know it or not. The behaviors that get praised, the misses that get punished, and the moments that get ignored together form an operant schedule that conditions your senior team week after week.
A conscious leader designs that schedule deliberately. An unconscious one inherits it.
A predictable bonus loses its motivational pull within one cycle. A variable, well-timed reward — recognition that arrives at the moment of positive surprise — keeps shaping behavior for years. This is why spot bonuses outperform scheduled ones at a fraction of the cost.
The lesson is not "pay less." It is "pay better, less often, and never on a calendar."
The principal-agent problem is not just for asset managers. It shows up between CEO and board, between executive and team, between team and individual contributor. The agent's incentives are never identical to the principal's. The question is how aligned, and how visibly.
Most "execution problems" are agency problems wearing different clothes.
First-order thinking asks "what will happen?" Second-order thinking asks "and then what?" Almost every comp plan, KPI, and policy fails on second order. The discipline is to write the second-order paragraph before approving the first-order change.
Break a problem down to irreducible truths and rebuild from there.
"Reasoning by analogy is fast. Reasoning by first principles is right."
Open full entry →Musk on rockets: 'What are the raw materials? What do they cost?'
Strategic resets when industry assumptions stop holding.
Every annual plan: list five assumptions you'd defend, then attack each one.
Ask 'and then what?' — twice.
"First-order: feels great. Second-order: explains why your industry is now broken."
Open full entry →Quarterly bonuses make this quarter great and erode the next five.
Forecasting how today's policy mutates incentives over time.
Pre-mortem every major decision two and three orders out.
Solve forward by asking how to fail.
"Don't ask 'how do we win?' Ask 'how would we guarantee we lose?' Then avoid that."
Open full entry →Charlie Munger: 'All I want to know is where I'm going to die, so I never go there.'
Pre-mortems and stress-tests on flagship initiatives.
Run an 'evil twin' exercise: how would a saboteur kill this plan?
Small advantages, applied consistently, become uncatchable.
"Boring discipline beats brilliant inconsistency. Always."
Open full entry →1% better every day = 37x better in a year.
Talent, learning, brand, and reputation strategy.
Design for consistency over heroics. Measure rate-of-improvement.
Self-reinforcing loops of momentum.
"Once the flywheel turns itself, you're not selling anymore — you're collecting."
Open full entry →Amazon's selection → lower prices → traffic → more selection.
Designing growth engines that don't require constant new fuel.
Map every business as loops, not as funnels.
Observe, Orient, Decide, Act — faster than your competitor.
"Speed isn't a tactic. Speed is the strategy."
Open full entry →Fighter pilots, hedge funds, and startups all win on cycle time.
Operating tempo in volatile markets and AI rollout.
Compress decision cadence. Weekly beats monthly beats quarterly.
The longer an idea has survived, the longer it likely will.
"Shakespeare will outlive your favorite podcast."
Open full entry →Concepts that have lasted 50 years probably last another 50.
Distinguishing fads from durable shifts.
Default skepticism on the new; default attention on the durable.
Behavior emerges from structure, not from individuals.
"Blame the system. People are usually responding to it rationally."
Open full entry →Bad outcomes from good people = system design failure.
Diagnosing organizational dysfunction at the incentive layer.
Always ask: 'What system is producing this behavior reliably?'
Build buffers so small mistakes don't become fatal.
"Plans should survive their own author being wrong about something."
Open full entry →Buffett buying companies at a discount to intrinsic value.
Capital allocation and downside protection in strategy.
Sized so that the most likely error case is still survivable.
Know the perimeter of what you actually know.
"Most disasters live just beyond a leader's circle of competence."
Open full entry →Buffett's refusal to invest in tech for decades.
Saying no to opportunities outside genuine expertise.
Annual: write down what you know cold, what you sort-of know, what you don't.
Models are simplifications — never the thing itself.
"The strategy deck is not the strategy. The dashboard is not the business."
Open full entry →GPS is useful until you drive into a river.
Refusing to mistake the strategy deck for the business.
Pair every model with the question: 'What is this model not capturing?'
Don't attribute to malice what's explainable by incompetence — or incentives.
"The villain in your story is probably just responding to their comp plan."
Open full entry →The 'dysfunctional team' is usually a well-designed response to misaligned incentives.
Diagnosing dysfunction without manufacturing villains.
Default to structure. People are last on the list.
Prefer the simplest explanation consistent with the evidence.
"The simplest story that fits the data is usually the story."
Open full entry →Sales are down because demand is down. Not because of a 7-part conspiracy.
Cutting through political over-theorizing in postmortems.
Start with the boring explanation. Earn the complex one.
Most outcomes come from a few causes.
"80% of your strategy work serves 20% of your strategy."
Open full entry →20% of customers drive 80% of revenue. Frequently.
Prioritizing the few incentives doing the heavy lifting.
Quarterly: identify the 20% and ruthlessly defund the rest.
What does it cost to leave?
"The deepest moats are made of inconvenience."
Open full entry →Enterprise software lock-in. Friendship. Cultural fit.
Designing customer and employee architecture.
Periodically estimate every key vendor's switching cost. Don't be surprised later.
Value grows with the number of users.
"The right side of the network wins. The wrong side dies."
Open full entry →Phones, marketplaces, social platforms, LinkedIn.
Evaluating platform strategy and competitive moats.
Distinguish real network effects from cosmetic ones.
Beliefs about reality shape the reality.
"If everyone thinks the company's great, the company gets great. Until they don't."
Open full entry →Bubbles, runs, and credit cycles.
Reading bubble dynamics in markets and inside organizations.
Distinguish self-fulfilling beliefs from self-defeating ones.
Systems that gain from disorder.
"Robust survives the storm. Antifragile gets stronger because of it."
Open full entry →Immune systems. Open-source projects. Some startups.
Designing org structures that strengthen under stress.
Build optionality into the system. Stress-test rather than predict-and-protect.
High-impact, hard-to-predict, retrospectively explainable events.
"Every Black Swan looks obvious in the post-mortem."
Open full entry →2008. COVID. ChatGPT.
Strategy that survives the events you can't predict.
Invest in resilience and optionality, not in better forecasts.
Decision-makers should bear the consequences of their decisions.
"Advice from people with no downside is worth what they paid to give it."
Open full entry →Bank execs who don't hold their own bank's stock.
Aligning decision rights with decision consequences.
Audit your own org: who decides, who pays the price if it's wrong?
Investments that give you future choices.
"The right to act, with no obligation to. Worth more than it sounds."
Open full entry →Small bets across many promising areas vs. one large committed bet.
Innovation portfolio construction.
Price the option value of every initiative, not just its expected return.
Convex payoffs gain more than they lose; concave do the opposite.
"Hunt for convex. Run from concave."
Open full entry →Venture capital is convex. Insurance underwriting is concave.
Choosing strategies whose error distributions are kind.
Plot every initiative on the convex/concave axis before committing.
Combine extreme safety with extreme risk; avoid the middle.
"The middle is where you die."
Open full entry →90% in cash, 10% in venture; almost nothing in 'medium-risk medium-return.'
Portfolio construction and innovation funding.
Audit your portfolio for the slow death of medium.
Probability × payoff, summed across outcomes.
"Outcomes are noise. Decisions are signal."
Open full entry →A 10% chance of winning $1M is worth $100K in expectation.
Make decisions by expected value; judge them by process, not outcome.
Document EV thinking on big decisions. Re-read after the outcome.
Risk has known probabilities. Uncertainty doesn't.
"We confuse the two and price both wrong."
Open full entry →Casino games (risk) vs. AI regulation in 2027 (uncertainty).
Mis-pricing uncertainty as risk and missing the real tail.
Tag every assumption: known distribution or genuine unknown?
Start with a prior; update with new evidence.
"Beliefs are bets you've placed. Update them when the table changes."
Open full entry →Updating sales forecasts as the quarter develops.
Strategic posture that evolves with evidence instead of defending priors.
Force documented prior + update on every major call.
Decisions depend on what other strategic actors will do.
"You're not playing against the market. You're playing against everyone playing the market."
Open full entry →Pricing wars. Standards adoption. M&A.
Anticipating competitor and counterparty moves.
Always model the second player. Never the first move alone.
A state where no player benefits from changing strategy unilaterally.
"Equilibrium isn't optimal. It's just stable."
Open full entry →Most industry pricing settles into a Nash equilibrium.
Recognizing when a market is structurally stuck.
Look for structural disruptions that break the equilibrium.
Individual rationality produces collective irrationality.
"Every cartel, climate negotiation, and tech price war."
Open full entry →Two competitors over-spending on marketing because neither can stop first.
Most corporate dysfunctions are repeated prisoner's dilemmas.
Engineer cooperation: long horizons, binding commitments, reputation.
Start cooperative; copy your counterpart's last move thereafter.
"The winningest strategy in repeated games. Also good parenting."
Open full entry →Reciprocal partnership norms.
Strategy for repeated negotiation.
Use forgiving variants; small punishments, fast resets.
The default coordination outcome people converge on without communicating.
"Where everyone meets when they can't talk first."
Open full entry →Times Square at noon. Grand Central clock. 9-to-5 work hours.
Defaults are the strongest coordination mechanism.
Engineer the Schelling point you want. Don't inherit the one you got.
Design rules without knowing where you'll land under them.
"Pre-commit to fairness before you know which side you're on."
Open full entry →Compensation policies designed before knowing your future role.
Building governance robust to leadership change.
Write policy as if you might be in any role within the next five years.
Shared resources get over-consumed by individual rational actors.
"Everyone took a little extra. Nothing's left."
Open full entry →Engineering capacity. Brand reputation. Cross-functional time.
Most cross-functional dysfunction is a commons tragedy.
Assign clear ownership. Price the commons.
With clear property rights and low transaction costs, parties negotiate to efficient outcomes.
"Most disputes are about unclear rights, not unclear values."
Open full entry →Cross-functional disputes over scarce engineering resources.
Resolve org friction by clarifying decision rights, not by adding process.
Map decision rights before adding process.
Specialize in what you give up the least to do.
"Even if you're better at everything, you're not better at it equally."
Open full entry →Org design: who does what based on relative cost, not absolute skill.
Allocate work by opportunity cost, not by capability alone.
Periodically ask: what should each person stop doing entirely?
Decisions hinge on the next unit, not on the average.
"Averages are for reporting. Margins are for deciding."
Open full entry →Don't price by total cost; price by marginal cost.
Pricing, capacity, and resource decisions.
Always ask: 'What is the cost / value of the next one?'
Past investment is irrelevant to future decisions.
"It's already gone. The only question is what's next."
Open full entry →Killing a project on its forward economics, not its history.
Capital reallocation discipline.
Decision template that asks: 'If we were starting fresh today, would we fund this?'
The value of the next-best thing you could have done.
"Every yes is a no to something invisible."
Open full entry →Time on the wrong project costs the right one.
Strategic discipline is portfolio discipline.
Force ranked alternatives on every major commitment.
Each additional unit produces less marginal benefit.
"The tenth meeting on the topic does not produce ten times the clarity."
Open full entry →Engineering team scaling. Marketing spend. Strategy review depth.
Knowing when to stop investing.
Pre-define the curve. Stop where the slope flattens.
When a measure becomes a target, it ceases to be a good measure.
"The metric you optimize against is the metric that betrays you."
Open full entry →Engagement metrics that drive worse experiences.
Performance management drift over time.
Rotate metrics. Pair every metric with a counter-metric.
The more a quantitative indicator is used for decision-making, the more it distorts the process it measures.
"The harder you measure, the harder the thing you measure changes shape."
Open full entry →Test scores in education.
Long-running metrics drift toward gameability.
Periodically refresh KPI sets. Defend the underlying intent.
A reward designed to reduce X produces more X.
"British bounty on cobras → cobra farms."
Open full entry →Bug bounties producing artificially created bugs.
Always model the rational response to a new incentive.
Red-team every new reward structure before launching it.
Looking where the light is, not where the keys are.
"Most analytics happen where the data is, not where the answer is."
Open full entry →Measuring conversion because we have the data, not because it's the lever.
Decision analytics drift toward convenience.
Start with the question; build the data toward it, not the other way.
Don't remove something until you understand why it was put there.
"Every weird policy was probably written after a fire."
Open full entry →New leadership removes a process and immediately re-creates its original problem.
Reform agendas that under-respect institutional memory.
Before removing: write the steelman case for why it exists.
Average outcomes across the population differ from outcomes across time for one person.
"Russian roulette has a great expected value. Once."
Open full entry →Strategies with great averages that bankrupt individual players.
Don't confuse population statistics with personal survival.
Always ask: 'Can I survive each individual draw, not just the average?'
Bet size optimized to maximize long-run growth without ruin.
"Bet too big and you blow up. Bet too small and you starve."
Open full entry →Position sizing in investing and in capital allocation.
Sizing big bets so the org can survive losing them.
Size every major bet by survivability, not just expected value.
A small number of items account for most of the value.
"Normal distributions are the exception, not the rule."
Open full entry →Venture returns. Wealth. Content engagement.
Don't manage power-law businesses like normal-distribution ones.
Find your power law before designing your incentives.
Aggregating many niche markets equals or exceeds the mainstream.
"The thin end of the curve is wider than it looks."
Open full entry →Amazon, Spotify, marketplaces.
Distribution strategy and product depth.
Always price the long tail; it's where new entrants enter.
Low-end or new-market entrants overtake established incumbents.
"The new entrant looks like a toy until it isn't."
Open full entry →Digital cameras. Streaming. AI tools.
Reading early signals of structural shifts.
Watch the bottom of your market more carefully than the top.
Doing everything right by current customers can kill you.
"The smartest companies fail by being smart at the wrong game."
Open full entry →Kodak, Blockbuster, Nokia.
Designing internal counter-incumbents.
Spin up internal disruption teams with their own P&L.
Technologies grow slowly, then explode, then plateau.
"Most companies invest at the top of the S and harvest at the bottom of the next."
Open full entry →Mobile, cloud, AI.
Reading where on the curve a technology actually is.
Maintain a parallel S-curve in early R&D continuously.
Innovators → early adopters → early majority → late majority → laggards.
"If you're selling to the late majority, the innovation is over."
Open full entry →AI adoption curves inside companies.
Marketing, change management, and strategy phasing.
Know which adopter segment you're talking to today. The pitch changes.
The gap between early adopters and the early majority kills most products.
"The hardest sale is the second category of customer."
Open full entry →Tech products that thrived with enthusiasts and died with the mainstream.
Product-market fit graduation.
Plan deliberately for the chasm; it isn't accidental.
Customers hire products to do a job in their life.
"Nobody bought the drill. They bought the hole."
Open full entry →Milkshakes hired for the morning commute.
Product strategy and innovation.
Interview for jobs, not for features.
Imagine the project failed; explain why.
"Easier to predict failure than success — and far more useful."
Open full entry →Capital decisions stress-tested before commit.
Reduces planning fallacy and groupthink.
Run on every major commitment as standard process.
Adversarial review by an internal opposition.
"Pay someone to attack the plan before the market does."
Open full entry →Security, intelligence, and increasingly, strategy.
Surfacing hidden assumptions.
Standing red team for strategic decisions over $X.
A designated dissenter in any major decision.
"Manufactured dissent beats sincere consensus."
Open full entry →Built into the Catholic Church's canonization process originally.
Counterweight to groupthink in leadership teams.
Rotate the role; reward the work; protect the dissenter.
Two-way doors vs. one-way doors.
"Reversible: move fast. Irreversible: move careful."
Open full entry →Bezos: 'Most decisions are two-way doors. Treat them that way.'
Decision velocity calibrated to reversibility.
Tag every decision: reversible or not. Speed accordingly.
Urgent vs. important; act, schedule, delegate, delete.
"Most calendars optimize urgent. Most strategies need important."
Open full entry →Executive calendar audits.
Time and attention allocation.
Weekly: classify last week's hours. Notice the drift.
Important-but-not-urgent is where strategic leverage lives.
"Important-and-not-urgent is where careers (and companies) are made or lost."
Open full entry →Strategic thinking, relationship building, deep learning.
Differentiating value comes from non-urgent work.
Pre-schedule QII time. Defend it ruthlessly.
How will I feel about this in 10 minutes / 10 months / 10 years?
"Three timeframes. Three answers. Often three different decisions."
Open full entry →Job offers, M&A, relationships.
Stress-test irreversible decisions.
Use on any decision with multi-year consequences.
Choose the option you'll regret least at 80.
"Bezos's framework for leaving a steady job to start Amazon."
Open full entry →Founders, partnerships, career pivots.
Decisions with long-tail consequences.
Pair regret-minimization with EV — they should converge.
The best place nearby vs. the best place overall.
"Climbing the wrong mountain very efficiently is still climbing the wrong mountain."
Open full entry →Companies that optimize a dying market structure.
When optimization becomes the enemy of innovation.
Periodic 'are we on the right mountain?' reviews.
Hedgehogs know one big thing; foxes know many small things.
"Hedgehogs make better forecasts on familiar terrain; foxes survive everywhere else."
Open full entry →Specialist vs. generalist roles in executive leadership.
Team composition; advisor composition.
Build leadership benches with both, on purpose.
Intersection of what you're best at, passionate about, and economically viable in.
"The three circles. Live where they overlap."
Open full entry →Strategy clarity for individuals and orgs.
Strategic focus framework.
Re-test the three circles annually as conditions change.
Causal chain from inputs to outputs to outcomes to impact.
"If you can't draw it, you can't run it."
Open full entry →Balanced scorecard, OKR cascades.
Strategy clarity and execution alignment.
Force every initiative to map to the chain explicitly.
Where, how, what — in that order.
"Most plans skip the first one and live with the consequences."
Open full entry →Coherent strategy documents.
Strategic clarity.
Every plan: confirm vision, defend strategy, then debate tactics.
Ambitious objectives paired with measurable key results.
"Good when used as guidance. Toxic when used as comp targets."
Open full entry →Google's adoption from Intel.
Strategy execution and alignment.
Decouple OKRs from individual compensation.
Start from the customer outcome and reason backward to today.
"Most strategy is built forward and works backward at random."
Open full entry →Amazon's PR-FAQ method.
Product strategy and roadmapping.
Write the future press release first. Then build to it.
Teams small enough to be fed by two pizzas.
"If you can't feed it, you can't run it."
Open full entry →Amazon's org design principle.
Operating cadence and team design.
Audit team sizes quarterly. Split when they balloon.
Software architecture mirrors org structure.
"Your product is your org chart in production."
Open full entry →Microservices teams produce microservices.
Tech architecture as a function of human architecture.
Design the org you want the product to reflect.
Adding people to a late project makes it later.
"Nine women can't make a baby in a month."
Open full entry →Engineering staffing decisions.
Resource allocation discipline.
Don't throw bodies at schedule problems. Throw decisions.
Where you can go is constrained by where you've been.
"Today's options are yesterday's decisions wearing new clothes."
Open full entry →Tech stack debt. Org structure debt. Strategic debt.
Recognizing structural constraints in strategy.
Periodically audit historical decisions still shaping today.
Extreme results tend to be followed by less extreme ones.
"The hot hand and the cold streak both end."
Open full entry →Performance management. Investment returns.
Don't overweight outliers in either direction.
Look at rolling averages, not point-in-time peaks or troughs.
Your sample isn't random.
"Surveys of your best customers are not surveys of your customers."
Open full entry →Customer feedback dominated by power users.
Strategy decisions distorted by non-random data.
Always ask: 'Who's not in this data?'
False positives vs. false negatives.
"Both have a cost. Pick which one you'd rather make."
Open full entry →Hiring decisions, AI deployment, strategic pivots.
Calibrating decision thresholds by which error is worse.
Explicitly state which error type is more costly before deciding.
Posterior = (likelihood × prior) / evidence.
"Beliefs as probabilities. Evidence as updates. Both mandatory."
Open full entry →Forecast revision. Strategy adjustment.
Decision quality under uncertainty.
Use Bayes-shaped reasoning even informally on big calls.
Decisions optimize utility, not value.
"$1M to a billionaire is not $1M to a startup."
Open full entry →Risk aversion in capital allocation.
Why two rational actors can disagree on the same EV.
Factor utility curves into decision frameworks for big bets.
Choose the option whose worst-case regret is least bad.
"Sometimes the right call is the one you won't regret most."
Open full entry →Risk-averse capital allocation.
Decisions where survival matters more than upside.
Use when ruin is on the table.
How outcomes are weighted in the decision calculus.
"Tell me your loss function and I'll predict your decisions."
Open full entry →ML models optimize loss functions explicitly. Companies do it implicitly.
Most strategy disputes are loss-function disputes.
Make the loss function explicit in every major decision.
Always have a working model of what your counterpart believes.
"If you can't argue their case better than they can, you don't understand them."
Open full entry →Negotiation. Competition. Cross-functional debate.
Strategy that anticipates response.
Before any major move: 'How will they read this?'
Modeling what others think, want, and will do.
"Most failed plans assumed the other side didn't have a strategy."
Open full entry →Sales, leadership, negotiation, parenting.
Stakeholder management.
Map the room before walking into it.
Career envy. Strategy envy. Product envy.
Companies copy competitors instead of choosing.
Examine wants for sources. Decide what you'd want with nobody watching.
Much of human behavior is positioning for status.
"Strip status out of org behavior and 80% of meetings disappear."
Open full entry →Internal politics. Conference attendance. Comp negotiation.
Recognizing what's actually being optimized.
Design status incentives intentionally. They exist whether you design them or not.
Working together has a cost that scales with the number of people.
"Every additional person doubles the messages."
Open full entry →Why big teams move slower than small ones.
Why headcount isn't always the answer.
Compute coordination cost before scaling teams.
A diverse set of models from many disciplines, used together.
"One model gets you misdiagnosis. Ten get you understanding."
Open full entry →Munger's interdisciplinary approach.
Executive reasoning quality.
Add a new model from a new discipline to your latticework every month.
Have a thesis. Update it on evidence.
"Convictions are positions, not identities."
Open full entry →Investing, strategy, leadership.
Pace and quality of decisions.
Track your top 10 strategic beliefs. Update them publicly.
Restate the opposing view at its strongest before responding.
"If you can't pass their argument back better than they made it, you're not ready to disagree."
Open full entry →Standard practice in elite debate teams.
Decision quality and conflict resolution.
Adopt as a leadership norm: argue the strongest version of the other side first.
Decompose a problem into estimable parts; multiply through.
"Right-order-of-magnitude beats no estimate."
Open full entry →Market sizing. Cost estimates.
Quick strategic order-of-magnitude reasoning.
Default to Fermi on any big question before deeper analysis.
Imagine the failure beforehand; investigate it afterward.
"Both halves required. One alone is theater."
Open full entry →Standard operating practice in elite engineering and military planning.
Continuous decision improvement.
Pair them as a process. Compare predictions to outcomes.
Decision time grows with the number of choices.
"Optionality is a feature until it becomes a tax."
Open full entry →UX design and strategic option-set design.
Why too many options paralyze.
Curate option sets before presenting them.
Working memory has limits.
"Your team's cognitive bandwidth is a resource. Spend it."
Open full entry →Why too-complex strategies fail in execution.
Strategy and product design.
Test strategy clarity by asking employees to restate it.
Single-loop fixes errors; double-loop questions the assumptions producing them.
"Most orgs are stuck in single loop and call it improvement."
Open full entry →Continuous improvement programs that never ask the deeper question.
Whether your learning system can change itself.
Periodic double-loop reviews on every major program.
Approach a situation as if you knew nothing.
"Expertise calcifies. Curiosity moves."
Open full entry →Senior leaders entering new markets.
Avoiding expertise traps.
Reset deliberately on familiar topics.
Reason in distributions, not in points.
"Forecasts without error bars are statements of preference."
Open full entry →Investment, planning, AI safety.
Strategy under uncertainty.
Require ranges, not points, on all forecasts.
A group decides on a course of action that nobody actually wants, because everyone assumes others prefer it.
"The road to collective disaster is paved with polite assumptions."
Open full entry →A team agrees to a painful relocation because each person thinks the others want it.
Watch for consensus that nobody privately supports.
Run anonymous pre-votes before any big group decision.
Inattention or forgetfulness caused by low attention, hyperfocus, or distraction.
"The brain's autocomplete feature, but for the wrong task."
Open full entry →Walking into a room and forgetting why you are there.
Errors happen when people are mentally checked out of the meeting they are physically in.
Design checklists and interruptions that restore attention to the right thing.
The urge to do something rather than wait, even when waiting is wiser.
"Doing something often feels better than doing the right thing."
Open full entry →A goalkeeper diving during a penalty kick even when staying still would stop more goals.
Leaders default to reorgs and announcements because motion feels like progress.
Create a 'wait and measure' option with equal legitimacy.
The minimum energy needed to start a reaction; same idea for starting habits or initiatives.
"The hardest part is not the work. It is starting the work."
Open full entry →A gym membership is unused until clothes are laid out the night before.
Reduce friction for the first step of any new process or behavior.
Pre-stage the first two minutes of every important task.
Power tends to corrupt, and absolute power corrupts absolutely.
"Give someone a crown and watch the halo slip."
Open full entry →Founders who become intolerant of dissent as the company grows.
Concentrated decision rights erode judgment over time.
Distribute power and rotate who holds the veto.
We attribute our own actions to situations but others' actions to their character.
"I am late because of traffic. You are late because you are careless."
Open full entry →A missed deadline is 'context' for you and 'incompetence' for your colleague.
Performance reviews are riddled with this double standard.
Force the same causal language for self and others.
Attacking the person making the argument instead of the argument itself.
"The fastest way to lose a debate and still feel like you won."
Open full entry →Dismissing a proposal because the presenter is 'too junior' to have an opinion.
Political meetings often substitute character assassination for analysis.
Restate the argument in neutral terms before anyone responds.
The brain evolved to reason adaptively, not always truthfully, to reduce the cost of errors.
"Beliefs are fitness tools, not truth detectors."
Open full entry →Overestimating risks after a recent scare, even when the data is unchanged.
Risk assessments swing with recent headlines rather than base rates.
Anchor forecasts to long-term data before discussing recent events.
We solve problems by adding, even when subtracting would be better.
"Every problem looks like a missing feature."
Open full entry →Adding another meeting instead of canceling a redundant one.
Organizations grow complexity because subtraction is politically harder.
Require a 'what can we remove?' question before approving any addition.
What cannot be settled by experiment is not worth debating.
"If you cannot test it, you cannot argue it."
Open full entry →Endless strategy debates about unmeasurable assumptions.
Many executive disputes are philosophical instead of empirical.
Convert every disagreement into a falsifiable prediction.
We let current emotion color our estimate of risks and benefits.
"If you like it, it is safe. If you fear it, it is dangerous."
Open full entry →Investors feel optimistic about a company because they like its CEO.
Gut-led decisions often dress themselves up as data-led.
Separate 'how do I feel?' from 'what do I know?' in write-ups.
Predicting how we will feel in the future, usually inaccurately.
"We are terrible weather forecasters for our own emotions."
Open full entry →Assuming a promotion will make us happy for years; it lasts months.
Retention bonuses and titles are overvalued because of this.
Survey people who already made the choice you are considering.
We favor people who are similar to us or who like us.
"Hire for 'culture fit' and accidentally hire for 'looks like me'."
Open full entry →A hiring manager prefers the candidate who shares their alma mater.
Affinity silently shapes who gets funded, hired, and promoted.
Blind relevant traits and use structured scorecards.
Assuming that if one option is true, another must be false, when both can be true.
"Or is not always exclusive."
Open full entry →'She is either ambitious or a team player' ignores that she can be both.
False trade-offs dominate strategic conversations.
Ask whether the two options are genuinely mutually exclusive.
If A implies B, and B is true, assuming A must be true.
"The room is dark, so the lamp must be broken. Or maybe it is just unplugged."
Open full entry →Sales are up after the campaign, so the campaign worked; maybe the market grew.
Attribution errors justify budgets and careers.
List all possible causes before claiming credit.
Someone who incites others to take illegal or rash action, often to expose or discredit them.
"The match that blames the fire."
Open full entry →A planted employee encourages a strike to justify management crackdown.
Watch for third parties who profit from your internal conflict.
Trace who benefits when a conflict escalates unexpectedly.
A finite set of well-defined instructions for solving a problem or performing a computation.
"The recipe that never forgets the salt, but also never questions the recipe."
Open full entry →Credit scoring models that approve or reject loans automatically.
Algorithms scale decisions, but they also scale embedded assumptions.
Audit algorithmic outputs for the edge cases humans would catch.
Every model simplifies reality; some are still useful.
"A map is not the territory, but it beats wandering blind."
Open full entry →Financial models are always wrong, yet they are still better than gut-only investing.
The best model is the one you remember to update.
Label each model's known simplifications before using it.
Researchers favor conclusions aligned with their school, team, or sponsor.
"The data is neutral. The analyst is not."
Open full entry →A pharma study funded by the drug's manufacturer finds more positive results.
Internal analytics often tell the story the team wants to hear.
Assign independent analysts and pre-register hypotheses.
Combining substances to create a new material stronger than its parts.
"Strength comes from the mixture, not the purity."
Open full entry →Steel combines iron and carbon to outperform either alone.
Cross-functional teams outperform silos when the mix is right.
Design teams where different skills are combined, not stacked.
Outcomes that could have happened but did not.
"History is written by the winners of paths not taken."
Open full entry →A risky bet succeeds and is called genius; the same bet could have failed.
Success narratives ignore the luck of the path taken.
Record the counterfactuals before the outcome is known.
We prefer known risks over unknown risks, even when the unknown may be safer.
"A devil you know beats an angel you cannot measure."
Open full entry →Sticking with a bad vendor because switching feels uncertain.
Status quo bias is partly fear of ambiguity.
Quantify the unknowns, however roughly, to make them comparable.
Overthinking a situation so that decision-making stalls.
"The more you think, the less you do."
Open full entry →A committee requests six more studies before approving a trivial purchase.
Complexity is sometimes a disguise for fear of accountability.
Set a decision deadline and a maximum information budget.
An overwhelming emotional response that overrides rational thought.
"When fear is driving, reason is in the trunk."
Open full entry →A CEO sends an all-hands email in anger that takes weeks to undo.
High-stakes moments are when the amygdala hijacks the boardroom.
Institute a 'cooling-off' rule for emotionally charged decisions.
We rely too heavily on the first piece of information offered.
"The first number in the room becomes the gravity well."
Open full entry →A salary negotiation is anchored by whoever names a number first.
First proposals, last quarter's numbers, and benchmarks all shape thinking.
Generate your own range before hearing anyone else's number.
Using personal stories or isolated examples instead of evidence.
"One data point is not a trend. It is a story."
Open full entry →'My cousin did fine without a degree' shapes hiring policy.
Leadership anecdotes often override systematic data.
Ask for the denominator behind every story.
Attributing human traits, emotions, or intentions to non-human entities.
"The market is not angry. It is just math."
Open full entry →Saying 'the algorithm hates me' when it is just following rules.
Teams humanize systems and then blame them like people.
Describe system behavior in mechanical, not emotional, terms.
Systems that grow stronger from shocks, volatility, and stressors.
"Robust survives. Antifragile gets better."
Open full entry →Open-source software improves because it is constantly attacked and patched.
Build organizations that learn from failure rather than preventing it.
Design small, recoverable stressors into the operating rhythm.
Perceiving meaningful connections between unrelated things.
"Pattern recognition without an off switch becomes conspiracy theory."
Open full entry →Seeing a stock pattern in random noise and trading on it.
Analysts find narratives in data that is mostly noise.
Require out-of-sample testing before acting on a pattern.
Manipulating emotions to win an argument rather than using evidence.
"If you cannot win the head, win the heart. Even if the heart is wrong."
Open full entry →A pitch uses fear of failure rather than projected ROI.
Charismatic presentations often defeat rigorous but boring ones.
Separate the emotional appeal from the factual claim in write-ups.
Assuming something is good because it is natural, or bad because it is unnatural.
"Poison ivy is natural. Vaccines are not. Choose carefully."
Open full entry →Preferring 'natural' management styles because they feel authentic.
'Natural' is often a marketing label, not a quality signal.
Judge interventions by outcomes, not by how organic they feel.
Assuming an idea is better simply because it is new.
"New is not next. Next is not right."
Open full entry →Adopting every new framework because it is the latest trend.
Innovation theater thrives on this bias.
Demand proof of superiority over the incumbent, not just novelty.
Assuming something is true because it is probable or possible.
"Probably true is not the same as true."
Open full entry →'This market will probably grow, so we should enter it.'
Strategic plans confuse possibility with probability.
Distinguish possible, probable, and proven before betting.
Assuming something is right because it has been done that way.
"We have always done it this way is not a strategy. It is a resignation letter."
Open full entry →Keeping a legacy process because it is 'how things are done'.
Tradition is the enemy of adaptation in fast-moving markets.
Make the current process defend itself against a blank-sheet design.
Exploiting price differences between markets for risk-free profit.
"The same thing selling for two prices is a math problem wearing a suit."
Open full entry →Buying a stock in London and selling it in New York for a spread.
Arbitrage opportunities reveal information gaps and inefficiencies.
Automate monitoring of price and terms across markets.
Using an authority's opinion as evidence, regardless of its merits.
"Expertise in one field does not transfer to every field."
Open full entry →A famous CEO's opinion on public health is treated as fact.
HiPPOs (highest paid person's opinions) dominate decisions.
Ask what the authority knows specifically about this question.
Claiming something is true because it has not been proven false.
"Absence of evidence is not evidence of absence."
Open full entry →'We have never had a security breach, so we are secure.'
Risk plans often fail because a threat has not yet appeared.
List what would prove the claim false and look for it.
Sun Tzu's ancient treatise on strategy, deception, and positioning.
"The oldest strategy book still wins the newest boardroom battles."
Open full entry →Winning without fighting by shaping the competitive landscape.
M&A and market entry often mirror Sun Tzu's principles.
Study the opponent's incentives before committing forces.
Assuming qualities of one thing transfer to another because they are associated.
"Guilt by association, dressed up as logic."
Open full entry →'That consultant worked for a failed startup, so they must be bad.'
Resumes are judged by the companies listed, not the results delivered.
Evaluate based on direct evidence, not symbolic connections.
Masking the sponsors of a message to make it appear grassroots.
"Fake grass roots look real until you check who bought the seeds."
Open full entry →A company funds fake customer reviews to create buzz.
Astroturfing destroys trust once exposed.
Verify the source of endorsements and testimonials.
Conflict between belligerents with very different resources and tactics.
"The weak do not fight the strong on the strong's terms."
Open full entry →A startup competes by innovating in a niche a giant cannot prioritize.
Incumbents lose to asymmetric challengers all the time.
Identify where your size is a liability, not an asset.
Our perception is shaped by what we selectively pay attention to.
"What you look for is what you find. What you ignore is what hurts you."
Open full entry →A sales team only notices deals that are closing, missing churn signals.
Dashboards create attentional bias by what they display.
Rotate what is measured and highlight the metrics no one is watching.
Replacing a hard question with an easier one without realizing it.
"How much is this company worth? We answered how much we like the CEO."
Open full entry →Judging a complex policy by how easy its slogan is to remember.
Simpler proxies constantly replace the real target.
Write the hard question down and audit the substitute you used.
A self-reinforcing cycle where a belief becomes more plausible as more people repeat it.
"A rumor that becomes true because it is repeated enough."
Open full entry →A panic about a rare product defect spreads even as evidence remains thin.
Crisis communications must break the cascade before it hardens.
Lead with base rates and credible data, not reassurance.
We judge likelihood by how easily examples come to mind.
"The headline becomes the base rate."
Open full entry →After a plane crash, people overestimate flying risk despite it being low.
Recency and vividness distort risk and opportunity assessments.
Use historical data, not recent examples, to calibrate frequency.
When disconfirming evidence strengthens a person's existing belief.
"Facts are not always the antidote. Sometimes they are the fuel."
Open full entry →Showing a flat-earther more evidence makes them more convinced.
Change management fails when rebuttals feel like attacks.
Find shared values first, then introduce contradictory evidence gently.
We do or believe things because many others do or believe them.
"If everyone is jumping, the bridge is probably fine. Probably."
Open full entry →Investors pile into a hot sector because everyone else is.
FOMO drives M&A, hiring, and technology adoption.
Require a written case independent of peer behavior.
We accept vague, general statements as personally meaningful.
"You are a person who sometimes doubts yourself. Revolutionary."
Open full entry →Employees rate generic personality feedback as highly accurate.
Personality tests and horoscopes both exploit this.
Ask for specific predictions before trusting any assessment.
Ignoring general statistics in favor of specific, vivid information.
"The forest is full of oaks; you are still describing one leaf."
Open full entry →A 'perfect' candidate is hired despite a low base rate of success in that role.
Base rates are the most underused tool in executive hiring.
Start every prediction with the base rate, then adjust.
Novices experiencing early success, often due to variance and small samples.
"First-timers win because they have not yet learned how hard it is."
Open full entry →A new trader's first three bets win, convincing them they are gifted.
Early wins can build dangerous overconfidence.
Track long-term performance before scaling up a beginner's approach.
Any headline that ends in a question mark can be answered by the word no.
"If they knew it was yes, they would not have asked."
Open full entry →'Is this startup the next Amazon?' Probably not.
Media framing drives attention by asking inflammatory questions.
Rewrite headline questions as factual claims and evaluate them.
A color appears different depending on adjacent colors.
"Context is not decoration. It is the whole experience."
Open full entry →The same product price feels different next to a premium vs. budget option.
Pricing and positioning are inseparable from context.
Test every offer in the context customers will actually see.
We see biases in others but not in ourselves.
"Everyone else is biased. I am just perceptive."
Open full entry →A leader warns the team about confirmation bias while ignoring their own.
The most dangerous bias is the one you deny having.
Assume you are biased and ask others to name the bias they see.
Unusual or bizarre material is more memorable than common material.
"Normal slides are forgotten. The weird ones are quoted."
Open full entry →A presentation with one absurd analogy is remembered more than a balanced one.
Marketing messages compete for memory, not just attention.
Deliberately place one striking, unusual element in key communications.
A persuasive message produces the opposite of its intended effect.
"The harder you push, the harder they push back."
Open full entry →A health campaign scares smokers, who then smoke more to cope.
Change programs can increase resistance if they feel coercive.
Use autonomy-preserving language and small voluntary commitments.
A single constraint limits the throughput of an entire system.
"The chain is only as strong as its weakest link. And it is usually one link."
Open full entry →A fast factory stalls because one inspection station is understaffed.
Adding capacity everywhere except the bottleneck wastes money.
Find the bottleneck first, then protect and expand it.
The energy needed to refute bullshit is an order of magnitude bigger than to produce it.
"Lies run sprints. Truth runs marathons."
Open full entry →A false claim spreads in minutes; the correction takes days and never reaches everyone.
Misinformation is an asymmetric threat to every organization.
Invest in rapid, credible response teams and pre-bunked narratives.
Adding manpower to a late software project makes it later.
"Nine women cannot make a baby in one month."
Open full entry →Throwing engineers at a delayed launch slows it down because of onboarding overhead.
More people does not always mean faster delivery.
Add people only when communication overhead is lower than the work gained.
Individuals are less likely to help when others are present.
"When everyone is responsible, no one is responsible."
Open full entry →A security bug is ignored because everyone assumes someone else is handling it.
Clear ownership prevents diffusion of responsibility.
Assign a single named owner for every critical issue.
A substance that speeds up a reaction without being consumed.
"The spark that does not become ash."
Open full entry →A great facilitator accelerates a team without making the decision.
Catalysts multiply impact without adding headcount.
Identify who or what lowers the activation energy in key processes.
Using a fake identity to deceive someone, usually for gain or manipulation.
"Not everyone who shows up to the meeting is who they say they are."
Open full entry →A competitor creates a fake persona to gather intelligence on LinkedIn.
Identity verification matters in hiring, sales, and partnerships.
Verify identities and credentials through independent channels.
Nonlinear systems are highly sensitive to initial conditions.
"A butterfly flaps its wings. A supply chain collapses."
Open full entry →Small scheduling changes cascade into major project delays.
Complex systems produce outcomes that are hard to predict and control.
Build buffers and avoid optimizing every margin away.
Selecting evidence that supports a position while ignoring contradictory evidence.
"The data is not lying. The selection is."
Open full entry →A marketing report highlights the best-performing segment and hides the rest.
Cherry picking is the most common form of internal deception.
Require reporting of the full distribution, not just winners.
Every unnecessary element in a story must be removed, or it will be expected to matter.
"If you mention a gun on the wall, someone will expect it to fire."
Open full entry →A slide in a deck raises expectations that must be paid off later.
Unnecessary details create commitments and distractions.
Remove every element that does not serve the core argument.
Do not remove a fence until you know why it was put there.
"Every bad rule was once a solution to a worse problem."
Open full entry →A new leader cancels a process and the old problem returns immediately.
Reform agendas must respect institutional memory.
Write the steelman case for any rule before removing it.
The threat of retaliation suppresses legitimate speech or action.
"Fear does not need to punish everyone. It just needs to be believable."
Open full entry →Employees stop raising concerns because one whistleblower was punished.
Culture is shaped by what people fear will happen if they speak up.
Protect dissenters visibly and punish retaliation clearly.
The design of how choices are presented influences what people choose.
"The menu is the message."
Open full entry →Defaulting employees into a retirement plan dramatically increases participation.
Defaults, framing, and order shape customer and employee behavior.
Design defaults that align with long-term goals, not short-term convenience.
Grouping information into familiar units to improve memory and processing.
"The mind handles big ideas by breaking them into bite-sized patterns."
Open full entry →Phone numbers are chunked into groups of digits for easier recall.
Complex strategies must be chunked into memorable frameworks.
Use three to five named buckets for any important concept.
The conclusion is used as a premise, creating a closed loop.
"X is true because X is true. Compelling, if you are not thinking."
Open full entry →'We are the best because we sell the most; we sell the most because we are the best.'
Strategy decks often reason in circles.
Map the argument and check if any premise depends on the conclusion.
An incentive designed to reduce a problem produces more of it.
"The bounty was for dead cobras. People started cobra farms."
Open full entry →A bug bounty leads to employees planting bugs to claim rewards.
Every incentive creates a rational response; model it before launching.
Red-team every reward system before it goes live.
The ability to focus on one voice in a noisy environment.
"Your name cuts through every room."
Open full entry →A customer hears their own complaint in a sea of feedback.
Personalization and relevance break through noise.
Make messages relevant to the recipient's identity and goals.
A mechanism that locks you into a future action to overcome present temptation.
"Ulysses tied himself to the mast so he could hear the sirens and survive."
Open full entry →Automatic savings transfers prevent spending temptations.
Pre-commitments help teams execute long-term plans despite short-term pressure.
Build public commitments and penalties for backing out.
Information that everyone knows, and everyone knows that everyone knows.
"The emperor has no clothes, but nobody says it until someone does."
Open full entry →A known problem is not fixed until a leader names it publicly.
Culture change requires making private knowledge common knowledge.
Use all-hands forums to name the unnamed.
We care less as the number of victims increases.
"One death is a tragedy. A million is a statistic."
Open full entry →A single customer story moves more budget than a report on thousands.
Numbers numb; stories move.
Lead with a representative story, then anchor with the scale.
A system with many interacting parts that learn and adapt.
"The parts are smart. The whole is unpredictable."
Open full entry →Markets, ecosystems, and organizations all adapt in unexpected ways.
Top-down planning fails when the system is constantly adapting.
Use probes, feedback loops, and decentralized decision rights.
Assuming a specific condition is more probable than a general one.
"The more detailed the story, the more likely it feels, and the less likely it is."
Open full entry →'A successful CEO who is also a yoga instructor' feels more likely than just 'a successful CEO'.
Detailed scenarios feel more credible than base rates.
Compare specific scenarios to their broader category first.
Remembering past attitudes and behavior as more consistent with present ones.
"We rewrite our autobiography to match who we are now."
Open full entry →A manager claims they always believed in a project that they once opposed.
Post-hoc rationalization makes organizational learning harder.
Document decisions and reasoning in real time.
Environmental factors influence perception and judgment.
"The same wine tastes different in a crystal glass versus a plastic cup."
Open full entry →A product seems premium in a luxury store and cheap in a discount shop.
Context changes value, not just presentation.
Test offers in the actual environment where they will be judged.
Removing a quote from its context to distort its meaning.
"A half-truth is a whole lie with good PR."
Open full entry →A customer testimonial is edited to sound glowing when the full quote was mixed.
Marketing and internal reporting both suffer from context stripping.
Show the full source for any claim that depends on a quote.
Avoiding contact with people or things perceived as 'contaminated'.
"Bad luck, like bad news, is treated as contagious."
Open full entry →A team avoids a project because a failed leader once touched it.
Association-based avoidance blocks good opportunities.
Separate the object from its history with evidence.
Believing previously learned misinformation even after it has been corrected.
"Corrections rarely catch up with the original lie."
Open full entry →A retracted rumor still shapes how employees view a leader.
First impressions are sticky even when wrong.
Repeat the correction with the original false claim to overwrite it.
Renewed interest in a stimulus when a novel stimulus is introduced.
"New options reawaken old appetites."
Open full entry →A team loses steam on a project until a new competitor enters the market.
Novelty re-energizes engagement, for better and worse.
Introduce small novelties to sustain momentum without constant pivots.
Innovation destroys old industries and creates new ones.
"Progress is a polite word for obsolescence."
Open full entry →Streaming destroyed video rental, then reshaped film production.
Every successful business is eventually a target of creative destruction.
Invest in self-disruption before competitors do it for you.
A conditioned response changes disproportionately when reinforcement changes.
"Reward more, work more. Reward less, sulk more. The change is the story."
Open full entry →A sales team overperforms when commissions increase, then collapses when they are cut.
Incentive changes have outsized emotional and behavioral effects.
Model the response to both increases and decreases in rewards.
Groups sometimes behave as foolishly as the worst individuals.
"A thousand people can be wrong with breathtaking confidence."
Open full entry →A mob of investors drives a stock to irrational heights.
Boards and teams can reinforce collective delusion.
Appoint independent critics and reward dissent.
Judging phenomena by the standards of one's own culture.
"The fish does not see the water. We do not see our own culture."
Open full entry →A global strategy fails because it assumes local norms are universal.
Culture shapes what customers and employees expect and value.
Hire local interpreters and test assumptions in each market.
Reducing cognitive biases through training, structure, and process.
"You cannot remove the bias, but you can build a fence around it."
Open full entry →Using checklists to reduce aviation errors.
Debiasing is a systems problem, not a willpower problem.
Build prompts and reviews that force second looks.
The quality of decisions declines after a long session of deciding.
"Willpower is a finite resource. So is judgment."
Open full entry →Judges grant parole less often late in the day.
Afternoon executive decisions are riskier than morning ones.
Schedule important decisions early and simplify trivial choices.
Adding a third option makes one of the original options more attractive.
"The decoy is not there to sell. It is there to make the target look good."
Open full entry →A medium-priced subscription makes the expensive one look like a bargain.
Pricing menus are engineered around decoys.
Evaluate each option independently of the menu.
The idea that material conditions and contradictions drive historical change.
"Thesis meets antithesis; synthesis is never what either side expected."
Open full entry →Labor and capital tensions shape regulatory cycles.
Market structures evolve through conflict and contradiction.
Map the contradictions in your industry before they resolve against you.
Incompetent employees are promoted to management to limit their workflow damage.
"The least capable person is moved where they can do the least harm."
Open full entry →A bad engineer becomes a manager and becomes a worse manager.
Promotions often follow Peter's cousin.
Separate management track from technical track and reward both.
How much we value the present over the future.
"A dollar today is worth more than a dollar tomorrow. Usually too much more."
Open full entry →Companies underinvest in maintenance because the payoff is delayed.
High discount rates explain short-termism.
Use lower discount rates for long-term strategic investments.
Unskilled people overestimate their ability; experts underestimate theirs.
"The worst performers are the most confident. The best are the most worried."
Open full entry →A junior analyst argues aggressively while a senior asks clarifying questions.
Confidence is not a reliable signal of competence.
Weight judgments by track record, not by presentation polish.
A predisposition to solve a problem in a familiar way, even when a better way exists.
"The expert's trap: the right answer gets in the way of a better answer."
Open full entry →Engineers default to the technology they know best.
Experience becomes a cage when it prevents new approaches.
Require at least one alternative method for every proposed solution.
The whole has properties that the individual parts do not.
"No neuron is conscious, but the brain is."
Open full entry →A team produces creativity that no single member predicted.
Culture and performance emerge from interactions, not individuals.
Design interactions and feedback loops, not just individual roles.
Emotional states distort cognition and decision-making.
"Don't make decisions when you are hungry, angry, lonely, or tired."
Open full entry →A deal is rejected because the negotiator is in a bad mood.
Mood drives more decisions than leaders admit.
Delay consequential decisions during emotional spikes.
We underestimate how emotions and physical states influence decisions.
"Full people plan diets for hungry people."
Open full entry →A product designed for calm users frustrates stressed ones.
Customer personas often ignore the emotional state of use.
Test products and policies with users in realistic emotional states.
We believe we will change less in the future than we actually will.
"You think you are finished becoming yourself. You are not."
Open full entry →Employees resist development plans because they believe they are already fully formed.
Underestimating future change leads to brittle career and strategy plans.
Ask how you have changed in the past five years, then project forward.
We value things more once we own them.
"The coffee mug is worth more the moment it is yours."
Open full entry →Employees resist reallocating a project they started, even if it is failing.
Sunk commitment becomes emotional ownership.
Evaluate projects as if you were acquiring them today.
What is true for a group over time is not always true for an individual at each step.
"Russian roulette has a great expected value. Once."
Open full entry →A strategy with good average returns can bankrupt any single player.
Do not confuse population statistics with personal survival.
Ask whether each individual draw is survivable, not just the average.
Continuing a failing course of action because of prior investment.
"The deeper the hole, the more we insist on digging."
Open full entry →A project keeps getting funding because it has already consumed so much.
Sunk cost logic is the silent killer of capital allocation.
Set kill criteria before the project begins, not after it struggles.
Predicting more extreme outcomes than actually occur.
"The best case is always shinier in the imagination."
Open full entry →Forecasting a new product will be a blockbuster when most launches are modest.
Hype cycles are built on exaggerated expectations.
Compare forecasts to the base rate of similar launches.
Growth whose rate becomes ever more rapid in proportion to the growing quantity.
"It looks small until it is too big to ignore."
Open full entry →Viral adoption, compound interest, and pandemic spread all accelerate.
Exponential trends are missed because early numbers look flat.
Track ratios and rates, not just absolute levels.
Costs or benefits that affect third parties not involved in a transaction.
"Someone always pays. Sometimes it is not the buyer."
Open full entry →Pollution is a cost imposed on society by a producer.
Culture and reputation are externality factories.
Internalize externalities by measuring and pricing them.
Correlation does not imply causation.
"Ice cream sales and drowning deaths both rise in summer. Ice cream does not drown people."
Open full entry →Two metrics move together and are assumed to have a causal link.
Dashboards create false causality daily.
Demand a plausible mechanism and test for reverse causality.
Presenting two options as the only possibilities when more exist.
"The world is rarely A or B. Usually it is A, B, C, or none of the above."
Open full entry →'We either cut costs or grow revenue' ignores both/and strategies.
Strategic debates are framed as false dichotomies to force a side.
Ask for the options that are not on the table.
Recalling something that did not happen or recalling it differently.
"Memory is not a recording. It is a reconstruction with a bad editor."
Open full entry →A team remembers a project as successful when the data shows it was not.
Post-hoc narratives rewrite history.
Document facts and decisions contemporaneously.
For a claim to be scientific, it must be possible to prove it false.
"If nothing can prove you wrong, you are not right. You are just loud."
Open full entry →A strategy that is so vague no outcome could refute it.
Unfalsifiable strategies are immune to learning.
Define in advance what evidence would change your mind.
As more facts are learned about a topic, retrieving any one fact slows.
"The more you know, the harder it is to find the right thing at the right time."
Open full entry →Experts can be slower to answer simple questions because they know too much.
Knowledge management must organize, not just accumulate.
Use structured frameworks and retrieval cues.
Outputs of a system are routed back as inputs, amplifying or dampening change.
"What the system produces, the system consumes."
Open full entry →Customer complaints improve the product, which attracts more customers.
Organizations are built on feedback loops, intentional and accidental.
Design loops that reward the behavior you want repeated.
A rough calculation using order-of-magnitude reasoning.
"A fast wrong answer is often better than a slow exact one."
Open full entry →Estimating market size by breaking it into known components.
Executives need ballpark numbers before precise models.
Train teams to do back-of-the-envelope estimates before detailed analysis.
Mental discomfort from holding conflicting beliefs or values.
"We will change our minds, or we will change the facts. Usually the facts."
Open full entry →A smoker dismisses health data to reduce dissonance.
Leaders rationalize bad decisions rather than admit error.
Create safe ways to update beliefs without losing face.
Algorithms show us content that reinforces our existing views.
"The internet gave us infinite perspectives. We each chose one."
Open full entry →Two executives read the same news story but see completely different versions.
Homogeneous information feeds produce homogeneous thinking.
Deliberately seek sources that challenge your team's assumptions.
Asking 'why' repeatedly to trace a problem to its root cause.
"The fifth why is usually where the blame becomes the system."
Open full entry →A machine stops because a fuse burned out because there was not enough lubrication...
Root cause analysis prevents recurring problems.
Use 'Five Whys' before assigning blame or fixes.
Believing abilities are static and cannot be developed.
"'I am not good at this' becomes a self-fulfilling prophecy."
Open full entry →A leader avoids new skills because they believe talent is innate.
Fixed mindsets kill adaptability.
Reward effort, learning, and iteration, not just outcomes.
IQ scores have risen substantially over generations.
"The average person today would have been a genius a century ago."
Open full entry →Abstract reasoning improves with education and environmental complexity.
Talent pools are deeper than ever, but so are expectations.
Raise the bar and invest in continuous learning.
We overweight one aspect of an event when predicting its impact.
"We think the raise will change everything. It changes the commute."
Open full entry →Employees overestimate how much salary affects job satisfaction.
Predictions focus on salient features and miss the daily reality.
Ask people who already experienced the outcome what mattered most.
We accept vague, positive personality descriptions as highly accurate.
"The horoscope effect works even on people who do not believe in horoscopes."
Open full entry →Employees rate generic feedback as 'exactly right' about them.
Personality assessments and 360 reviews can feel more precise than they are.
Demand specific, predictive statements from any assessment.
Choices change depending on how options are presented.
"Same facts. Different frame. Different decision."
Open full entry →'90% survival' sounds better than '10% mortality' for the same surgery.
Every pitch, report, and headline is framed.
Reframe the same decision in at least two ways before choosing.
After noticing something, we start seeing it everywhere.
"You buy a blue car and suddenly every car is blue."
Open full entry →A competitor is mentioned once, then appears in every meeting.
Recency and attention create the illusion of a trend.
Track actual frequency, not just perceived frequency.
We attribute others' behavior to character but our own to circumstances.
"You are a jerk. I am having a bad day."
Open full entry →A peer misses a deadline because they are 'lazy'; you miss one because you are 'overloaded'.
Performance reviews often blame people for systemic issues.
Assume situational causes first for others' behavior.
Research outcomes tend to favor the interests of the funders.
"He who pays the piper often picks the tune."
Open full entry →A sponsored study finds the sponsor's product superior.
Vendor-funded whitepapers are not independent research.
Insist on independent funding or transparent conflicts of interest.
A complex system that works is invariably found to have evolved from a simple system.
"You cannot build complexity from scratch and expect it to work."
Open full entry →Successful platforms start simple and add complexity over time.
Big-bang launches of complex systems usually fail.
Start with a simple, working system and grow it.
Modeling decisions where the outcome depends on others' choices.
"You are not playing solitaire. Everyone else is playing too."
Open full entry →Pricing wars, auctions, and negotiations all involve game theory.
Strategy without considering competitors' responses is incomplete.
Model the second and third moves, not just your first move.
Making someone question their own reality or perceptions.
"The truth is not what happened. It is what you can make someone doubt."
Open full entry →A manager denies agreements that were clearly made.
Gaslighting destroys trust and retention.
Document decisions in writing and verify facts with multiple sources.
Experts believe news articles outside their field despite knowing their own field is misreported.
"We trust the same media we know is wrong on our own subject."
Open full entry →A doctor believes a business article while criticizing medical journalism.
General news is treated as credible even when specialized reporting is not.
Apply the same skepticism to every field.
As online discussions grow longer, the probability of a Nazi comparison approaches one.
"Eventually every argument ends at Hitler."
Open full entry →A product debate escalates to 'this is just like fascism'.
Hyperbolic comparisons derail serious discussion.
Intervene when comparisons become extreme and unproductive.
When a measure becomes a target, it ceases to be a good measure.
"The metric you optimize is the metric that betrays you."
Open full entry →Support teams optimize ticket closure speed over customer satisfaction.
KPIs inevitably drift toward gameability.
Rotate metrics and pair each with a counter-metric.
Bad money drives out good when both are legally equivalent.
"The easy-to-fake replaces the hard-to-fake."
Open full entry →Low-quality content crowds out high-quality content in attention markets.
Incentives can reward cheap signals over real value.
Design quality signals that are costly to fake.
Groups make more extreme decisions than individuals would alone.
"A committee is more radical than any of its members."
Open full entry →A board approves a riskier deal after group discussion than any member would individually.
Consensus can amplify risk, not reduce it.
Require pre-commitment of individual views before group discussion.
Desire for conformity leads to irrational or dysfunctional decisions.
"No one disagrees, but only because no one is willing to say it."
Open full entry →A team launches a flawed product because dissent felt disloyal.
Groupthink is the enemy of innovation and risk management.
Assign a formal devil's advocate and protect dissenters.
Believing abilities can be developed through effort and learning.
"'Not yet' is better than 'not good'."
Open full entry →A team treats failures as learning opportunities rather than verdicts.
Growth mindset predicts adaptability and resilience.
Praise process, effort, and improvement, not just talent.
One positive trait colors our overall impression of a person or thing.
"Good at one thing, good at everything. Until they are not."
Open full entry →A charismatic founder is assumed to be a great operator.
Halo bias shapes hiring, promotion, and investment decisions.
Evaluate each competency separately with evidence.
People change behavior when they know they are being observed.
"The act of measuring often changes what is measured."
Open full entry →Productivity rises when a new monitoring system is installed, then fades.
Pilot results often overstate long-term impact.
Measure unobtrusively and include a control period.
Neurons that fire together wire together.
"Repetition builds highways in the brain."
Open full entry →Daily practice makes a skill automatic.
Culture and habits are built through repeated reinforcement.
Design rituals that repeat the behaviors you want encoded.
In quantum mechanics, certain pairs of properties cannot both be precisely known.
"The act of measuring one thing makes another thing blurrier."
Open full entry →Customer surveys can change the very behavior they measure.
Measurement often disturbs the system being measured.
Account for observer effects when interpreting data.
People adopt behaviors and opinions because others do.
"Safety in numbers, even when the numbers are wrong."
Open full entry →A department adopts the same software as competitors without evaluation.
Herd behavior drives bubbles, fads, and missed opportunities.
Require an independent business case before following the crowd.
Decision time increases with the number and complexity of choices.
"More options, more paralysis."
Open full entry →A product with too many features confuses buyers and slows sales.
Choice overload reduces conversion and satisfaction.
Curate options to a manageable number and guide selection.
After an event, we believe we knew it would happen all along.
"Every crisis looks obvious in the rearview mirror."
Open full entry →After a product fails, everyone says the warning signs were obvious.
Hindsight distorts accountability and learning.
Document predictions in advance and compare them to outcomes.
What can be asserted without evidence can be dismissed without evidence.
"Make a claim, bring the proof. Otherwise, sit down."
Open full entry →A bold market claim is rejected until supporting data is shown.
Strong claims require strong evidence.
Ask for evidence before engaging with extraordinary claims.
Everything takes longer than you expect, even when you account for Hofstadter's Law.
"Projects are always late. Even the ones you pad."
Open full entry →A product launch is delayed despite generous timelines.
Planning fallacy is recursive.
Use reference-class forecasting and add buffers that are explicitly tracked.
Systems should be understood as wholes, not just as collections of parts.
"You cannot understand a car by cataloging every bolt."
Open full entry →Company culture is not the sum of policies; it is their interaction.
Reductionism misses the emergent properties of organizations.
Map interactions and feedback loops, not just individual functions.
Believing a streak of success will continue when outcomes are independent.
"A coin has no memory. Neither does a hot salesperson."
Open full entry →A fund manager is given more capital after a lucky streak.
Streaks are often randomness, not skill.
Evaluate performance over large samples, not hot streaks.
We prefer smaller immediate rewards over larger future rewards.
"A bird in the hand is worth two in the bush, even when the math disagrees."
Open full entry →Choosing a quick win over a long-term investment that pays more.
Quarterly pressure exploits this bias mercilessly.
Visualize future consequences and pre-commit to long-term choices.
We overestimate our ability to control events.
"We think we are driving. Often we are just holding the wheel in a moving car."
Open full entry →Traders believe their skill drives returns in a bull market.
Success is attributed to strategy when luck was the driver.
Separate controllable inputs from uncontrollable outcomes.
We overestimate how much others understand our thoughts and feelings.
"You think they know what you mean. They do not."
Open full entry →A leader assumes their vision is clear, but employees are confused.
Communication is harder than it feels.
Ask for paraphrase-back before assuming a message landed.
We overestimate our qualities and abilities relative to others.
"Most people think they are above-average drivers. Most are not."
Open full entry →Most teams rate themselves in the top quartile.
Overconfidence hides gaps and blinds teams to competition.
Benchmark against external data and independent assessments.
We overestimate the intensity and duration of emotional reactions.
"The bad news will not hurt as much as you fear. The good news will not last as long as you hope."
Open full entry →A feared reorganization is less disruptive than predicted.
People adapt faster than expected to both wins and losses.
Use historical adaptation data, not imagination, to predict impact.
Doubt about one's abilities and fear of being exposed as a fraud.
"Competent people often feel incompetent. The incompetent rarely do."
Open full entry →A high performer avoids new challenges because they feel undeserving.
Imposter syndrome limits talent utilization and retention.
Normalize it and use objective feedback to counter self-doubt.
We miss unexpected events when focused on something else.
"You cannot see the gorilla if you are counting passes."
Open full entry →A team misses a market shift because they are fixated on a competitor.
Focus creates blindness.
Rotate attention and build 'look up' rituals.
One party has more or better information than another.
"The seller knows the flaw. The buyer learns the hard way."
Open full entry →A job candidate knows their weaknesses better than the interviewer.
Markets and negotiations are shaped by who knows what.
Reduce asymmetry through verification, signals, and transparency.
People copy the choices of others, assuming they have private information.
"The crowd is not wise. It is just following the first person who looked wise."
Open full entry →A restaurant line forms because people assume the food is good.
Adoption and rejection can cascade without real information.
Seek independent signals before joining the crowd.
We favor members of our own group over outsiders.
"We are the best team because we are us, and they are them."
Open full entry →Hiring from the same network perpetuates demographic homogeneity.
Ingroup bias limits diversity and innovation.
Use structured criteria and diverse interview panels.
We ignore sample size when judging probability.
"A five-star review from two customers is not the same as from two thousand."
Open full entry →A small pilot is treated as definitive proof.
Small samples produce noisy conclusions.
Require confidence intervals and sample-size reasoning.
Different agents pursue the same subgoals regardless of their ultimate goals.
"Every AI wants more resources, more data, and more control. So do humans."
Open full entry →Competitors with different missions both seek market share and talent.
Subgoals become goals because they are measurable.
Check whether subgoals have drifted from the original mission.
Decisions involve trade-offs between costs and benefits at different times.
"Now-you and future-you are not always on the same team."
Open full entry →Investing today for returns tomorrow, or spending today and regretting tomorrow.
Capital allocation is intertemporal choice at scale.
Use explicit discount rates and future-self empathy exercises.
Doing something because it is inherently satisfying, not for external rewards.
"Pay people to do what they love, and they may stop loving it."
Open full entry →Developers lose interest when every task is tied to a bonus metric.
Crowding out intrinsic motivation is a real risk.
Balance rewards with autonomy, mastery, and purpose.
Bureaucracies tend to expand and protect themselves, regardless of their original purpose.
"The department exists to serve the department."
Open full entry →A compliance team grows even as compliance outcomes plateau.
Organizations become self-serving over time.
Tie survival and growth to measurable mission outcomes.
We believe the world is fair and people get what they deserve.
"Bad things happen to bad people. Except when they happen to good people."
Open full entry →Blaming a laid-off employee for 'not being good enough'.
Attribution of outcomes to merit ignores luck and structure.
Separate luck from skill when evaluating outcomes.
Keep it simple, stupid. Simplicity beats complexity in design and communication.
"If you need a diagram to explain it, you have already lost."
Open full entry →Simple products with fewer features often win.
Complexity is a tax on execution and adoption.
Force a one-page explanation of any plan or product.
Once we know something, it is hard to imagine not knowing it.
"Experts forget what beginners do not know."
Open full entry →A product team designs a feature that confuses new users.
The curse of knowledge makes onboarding and communication fail.
Test explanations with real beginners and novices.
As sample size grows, sample averages converge to expected values.
"Small samples lie. Large samples whisper the truth."
Open full entry →A few bad customers are noise; thousands are a signal.
Big decisions should rest on big samples.
Demand larger samples before drawing conclusions.
We expect small samples to reflect population properties.
"Three data points do not a trend make. Unless you are in a hurry."
Open full entry →A three-month sales trend drives a strategy change.
Small samples create false confidence.
Use confidence intervals and resist overinterpreting small samples.
Organizations give disproportionate weight to trivial issues.
"The board will spend an hour on the color of the bike shed."
Open full entry →A committee debates the font of a report while ignoring its flawed analysis.
Trivial issues are easier to understand and debate than complex ones.
Set agendas by impact, not by ease of discussion.
Giving up after repeated exposure to uncontrollable negative events.
"Failure teaches some people to try harder. Others, to stop trying."
Open full entry →A team stops proposing improvements because past suggestions were ignored.
Culture can train people to feel powerless.
Celebrate small wins and respond visibly to feedback.
Performance improves with practice, but gains slow over time.
"You get better fast, then better slowly, then you plateau."
Open full entry →A new salesperson improves quickly, then needs coaching to reach mastery.
Training ROI is highest early, then requires different interventions.
Plan for plateau-busting techniques after early gains.
When quality is hard to verify, bad products drive out good ones.
"The buyer cannot tell the difference, so the seller stops making the good one."
Open full entry →Used car markets struggle because buyers fear hidden defects.
Trust and signaling mechanisms determine market quality.
Invest in credible quality signals and guarantees.
The longer an idea has survived, the longer it is likely to survive.
"Shakespeare will outlive your favorite app."
Open full entry →Basic accounting principles outlast trendy management frameworks.
Distinguish durable ideas from fashionable ones.
Weight tradition more heavily when evaluating foundational practices.
Expecting change to happen at a constant rate.
"The future is not a straight line from the past."
Open full entry →Assuming revenue grows by the same percentage every quarter.
Linear projections miss compounding, saturation, and shocks.
Model nonlinear scenarios, including S-curves and step changes.
Optimizing in a small region while missing a better global solution.
"You climbed the tallest hill in the neighborhood, not the mountain."
Open full entry →Refining a current product instead of exploring a disruptive new model.
Incremental optimization can trap you far from the best answer.
Periodically explore radically different alternatives, not just refinements.
Customers become trapped in a product due to switching costs or network effects.
"The hotel is fine. The door just does not open from the inside."
Open full entry →Enterprise software that is hard to replace because of custom integrations.
Lock-in creates profits but also resentment.
Be transparent about switching costs and deliver value that earns loyalty.
Losses feel worse than equivalent gains feel good.
"Losing $100 hurts more than winning $100 feels good."
Open full entry →Employees resist changing a failing process because they fear losing control.
Framing choices as losses or gains changes behavior dramatically.
Reframe changes as gains, and protect people from perceived losses.
Treating real-world uncertainty like a game with clear, known rules.
"The real world does not have a rulebook or a referee."
Open full entry →Using normal distributions to model extreme market events.
Models from games fail when the rules are unknown and changing.
Stress-test models against unknown-unknown scenarios.
Each additional unit of a good provides less satisfaction than the previous one.
"The first slice of pizza is heaven. The fifth is a mistake."
Open full entry →Adding more engineers to a small project yields diminishing returns.
Scale benefits are not infinite; find the inflection point.
Track marginal return per unit of any input.
Markets fail to allocate resources efficiently on their own.
"The invisible hand sometimes drops the ball."
Open full entry →Pollution and public goods are underprovided by markets.
Regulation and internal governance can fix market failures.
Identify externalities and design mechanisms to internalize them.
When all you have is a hammer, everything looks like a nail.
"Your favorite tool becomes the answer to every problem."
Open full entry →A data team solves every issue with another dashboard.
Functional expertise narrows problem definition.
Ask what other tools or disciplines should be applied.
Relying solely on metrics that are easily quantified while ignoring what matters.
"We measured what was easy and forgot to measure what was important."
Open full entry →A war effort measured body count instead of strategic progress.
Vanity metrics often replace real outcomes.
Pair every quantifiable metric with a qualitative assessment.
We develop preferences for things simply because we are familiar with them.
"The song you hated grows on you after the third play."
Open full entry →Employees resist a new logo because the old one feels familiar.
Familiarity builds trust and adoption.
Repeat important messages and introduce change gradually.
Combining results from multiple studies to find robust conclusions.
"One study is a story. Many studies are evidence."
Open full entry →A meta-analysis of clinical trials reveals a drug's true effect.
Aggregate lessons across projects rather than relying on one anecdote.
Synthesize findings across teams and time periods.
Thinking about one's own thinking.
"The best thinkers are the ones who watch themselves think."
Open full entry →Noticing that you are confused and slowing down before deciding.
Metacognition is the foundation of learning organizations.
Build reflection time into decision processes.
People will obey authority even when asked to harm others.
"The uniform matters more than most people admit."
Open full entry →Employees follow unethical orders because they came from a boss.
Authority can override individual moral judgment.
Create explicit stop-rules and protect whistleblowers.
The simplest version of a product that can test a core hypothesis.
"Build the smallest thing that proves you are not crazy."
Open full entry →A landing page before a full product launch.
MVPs reduce waste and accelerate learning.
Define the one hypothesis you are testing before building anything.
A consistent minority can shift the majority's views over time.
"One person saying the same thing long enough can change the room."
Open full entry →A lone voice for data privacy gradually reshapes company policy.
Dissent is valuable even when it loses the vote.
Protect minority voices and reward consistency, not just conformity.
People take more risks when they are protected from the consequences.
"Insurance against failure sometimes causes failure."
Open full entry →Banks take bigger risks when they believe they will be bailed out.
Safety nets can distort incentives.
Align downside exposure with decision rights.
Past good behavior makes us feel entitled to later bad behavior.
"I ate a salad for lunch, so this donut is basically earned."
Open full entry →A company that donates to charity then feels entitled to cut corners.
Virtue signaling can mask subsequent vice.
Judge each action independently, not as a balance sheet.
Anything that can go wrong will go wrong.
"Hope is not a strategy. Neither is Murphy's Law, but it is more accurate."
Open full entry →The demo fails in front of the most important prospect.
Contingency planning is not pessimism; it is realism.
Plan for failure modes and rehearse responses.
We prefer stories over raw facts, even when the story is misleading.
"We remember the plot, not the data."
Open full entry →A founder's compelling story masks weak unit economics.
Narratives drive fundraising, hiring, and strategy more than spreadsheets do.
Separate the story from the evidence supporting it.
Negative events and information affect us more than positive ones.
"One criticism outweighs ten compliments."
Open full entry →A single customer complaint triggers a major pivot while thousands of silent users are ignored.
Risk aversion and loss aversion both stem from this.
Contextualize negatives with base rates and positive data.
A symmetric bell-shaped distribution where most values cluster around the mean.
"The world is normal, except when it is not."
Open full entry →Human heights are roughly normally distributed.
Many business variables are not normal; assuming they are is dangerous.
Check for fat tails and outliers before using normal assumptions.
A bias against ideas or products that originated outside the group.
"If we did not build it, it cannot be good."
Open full entry →A company rejects a proven vendor tool to build an inferior internal version.
NIH syndrome wastes resources and slows progress.
Evaluate solutions by total cost of ownership, not origin.
Prefer the simplest explanation that fits the evidence.
"The simplest story is usually the right one."
Open full entry →A sales drop is more likely demand-driven than a conspiracy.
Complexity is often a sign of weak thinking.
Start with the simplest explanation and earn complexity.
We overestimate the likelihood of positive outcomes for ourselves.
"Most people think they are less likely to fail than the average person."
Open full entry →Projects are planned with unrealistic timelines because planners are optimistic.
Optimism bias is the root of the planning fallacy.
Use outside-view and reference-class forecasts.
Judging a decision by its outcome rather than by the quality of the process.
"A good result makes a bad decision look genius."
Open full entry →A risky gamble is praised because it happened to pay off.
Outcome bias rewards luck and punishes sound judgment.
Evaluate decisions by the information available at the time.
We systematically overestimate the accuracy of our knowledge and judgments.
"The problem is not what we do not know. It is what we know for sure that is not true."
Open full entry →An executive forecasts revenue with 90% confidence and misses by 40%.
Overconfidence drives overcommitment and underpreparation.
Force calibrated probability estimates and track accuracy.
A model that explains historical data too closely will fail on new data.
"You memorized the test. You did not learn the subject."
Open full entry →A sales forecast that perfectly matches last year but fails next quarter.
Complex models often mistake noise for signal.
Test models on out-of-sample data and prefer simplicity.
The range of policies or ideas that are politically acceptable at a given time.
"What is crazy today is mainstream tomorrow."
Open full entry →Remote work moved from fringe to normal over a decade.
Leaders can shift what is discussable by repeating ideas.
Track how the acceptable range moves and adjust messaging.
Work expands to fill the time available.
"Give a team a month, and they will take a month. Give them a week, and they will find a way."
Open full entry →A project with a generous deadline takes the full time regardless of complexity.
Time is a variable that expands to match the container.
Set shorter deadlines and define done clearly.
We judge experiences by their peak and their end, not by the average.
"A terrible vacation with one great sunset becomes a great story."
Open full entry →A customer remembers the worst moment and the last moment of a support call.
Design experiences around peaks and endings.
Engineer a strong positive peak and a clean ending.
People are promoted until they reach a position where they are incompetent.
"The best coder becomes a manager and becomes a bad manager."
Open full entry →A top salesperson promoted to sales manager struggles to lead.
Promotions often reward past performance, not future competence.
Create separate tracks for technical and managerial advancement.
We underestimate the time, cost, and risk of future actions.
"The plan is perfect. Reality is the problem."
Open full entry →A project is budgeted for six months and takes eighteen.
Every roadmap is optimistic until it is not.
Use reference-class forecasting and add independent buffers.
Structuring actions so that responsibility can be denied.
"I did not know. Or at least, I can say I did not know."
Open full entry →A leader gives vague instructions to avoid accountability for outcomes.
Ambiguity is sometimes used to dodge responsibility.
Require named owners and written decision records.
The moment after which reversing a course becomes impossible or extremely costly.
"Before it, you have options. After it, you have consequences."
Open full entry →A product launch with a public announcement cannot be quietly canceled.
Big commitments should be flagged and reviewed before the point of no return.
Define go/no-go criteria and decision gates in advance.
Discrediting a source or person before they make their argument.
"If you poison the well, no one drinks the water, even if it is clean."
Open full entry →'Don't listen to her; she always defends the old regime.'
Ad hominem in advance blocks legitimate debate.
Hear the argument before evaluating the source.
We tend to remember pleasant information more accurately than unpleasant information.
"Memory is an optimist with a good editor."
Open full entry →Post-project reviews focus on wins and soften failures.
Rosy retrospection limits learning.
Document failures and challenges in real time.
Assuming that because B followed A, A caused B.
"The rooster crows and the sun rises. Therefore, the rooster caused the sunrise."
Open full entry →Sales rose after a rebrand, so the rebrand caused the rise.
Attribution is the hardest part of analytics.
Use controls and counterfactuals before claiming causality.
A relationship where a small number of inputs account for most outputs.
"A few causes create most effects."
Open full entry →A few customers generate most revenue; a few bugs cause most crashes.
Power laws exist everywhere, but they are rarely managed as such.
Identify the vital few and allocate resources accordingly.
Imagining a project has failed and working backward to find the causes.
"The best way to avoid failure is to pretend it already happened."
Open full entry →A team lists reasons a launch would fail before it goes live.
Pre-mortems surface risks that optimism hides.
Run pre-mortems before major commitments and assign owners to risks.
Individual rationality can lead to collective poor outcomes.
"Everyone defects because trusting looks risky. Everyone loses because no one trusted."
Open full entry →Two competitors overspend on ads because neither can stop first.
Most market dysfunction is a repeated prisoner's dilemma.
Build long-term relationships, reputation, and binding agreements.
We ignore probability when outcomes are emotionally charged.
"Fear and hope both make math disappear."
Open full entry →Spending disproportionately on a sensational but rare risk.
Emotional risks get funded; boring risks get ignored.
Quantify probabilities before allocating resources to risks.
People value gains and losses asymmetrically, and judge relative to a reference point.
"We are not rational calculators. We are reference-point refugees."
Open full entry →A $100 bonus feels different than a $100 salary difference.
Framing and reference points drive employee and customer behavior.
Design choices around reference points that serve long-term goals.
Higher expectations lead to higher performance.
"Believe someone is capable, and they often become capable."
Open full entry →Students perform better when teachers expect them to.
Manager expectations shape team performance.
Set high expectations and communicate them clearly.
We feel obligated to return favors, gifts, or concessions.
"A free sample is not free. It is a debt."
Open full entry →A vendor sends a small gift and gains a meeting.
Reciprocity is a powerful tool in negotiation and sales.
Be aware of gifts and favors that may create unconscious obligations.
A group assigned to challenge plans and find weaknesses.
"The best way to win is to have someone try to make you lose."
Open full entry →A red team attacks a new product launch to find vulnerabilities.
Red teams surface blind spots before adversaries do.
Make red-teaming a standard part of major decisions.
Extreme outcomes tend to be followed by more average ones.
"The best quarter is usually followed by an average one. Not because you got worse."
Open full entry →A star hire's second year is less stellar than their first.
Misattributing mean reversion to skill or intervention is common.
Expect reversion and distinguish it from real performance changes.
We judge probability by how similar an event is to a prototype.
"It looks like a duck, so we assume it is a duck."
Open full entry →Assuming a well-dressed candidate is more competent.
Stereotypes and prototypes drive hiring and investment decisions.
Look for base rates and direct evidence, not just resemblance.
People take more risks when they feel safer.
"Seatbelts make some drivers speed."
Open full entry →Better cybersecurity leads employees to use weaker passwords.
Safety measures can be undermined by behavioral responses.
Monitor behavior after safety improvements, not just outcomes.
A quick way to estimate how long it takes an investment to double at a given growth rate.
"Math for people who need the answer before the meeting ends."
Open full entry →At 7% growth, money doubles in about 10 years.
The rule of 72 makes compound growth intuitive.
Use it to sanity-check growth and interest projections.
Choosing a good-enough option rather than optimizing for the best.
"Perfect is the enemy of good enough."
Open full entry →A CEO hires a candidate who meets the bar rather than searching endlessly.
Satisficing saves time and reduces decision fatigue.
Set an 'good enough' threshold and stop searching once it is met.
In any dispute, the intensity of feeling is inversely proportional to the value of the stakes.
"The smallest issues produce the biggest fights."
Open full entry →A committee erupts over the color of a button while ignoring strategy.
Low-stakes conflicts consume disproportionate energy.
Calibrate meeting time to the stakes of the issue.
We value things more when they are scarce or hard to get.
"The last cookie is always the most delicious."
Open full entry →A limited-time offer drives purchases even when the product is not needed.
Scarcity is a standard persuasion tool.
Evaluate offers by need, not by perceived scarcity.
Projects gradually expand beyond their original goals.
"The project was small. Then it had feelings. Then it had features."
Open full entry →A simple website redesign grows into a full platform rebuild.
Scope creep is the default state of projects.
Lock scope with change-control processes and visible costs.
A belief that becomes true because people act as if it is true.
"Expect failure, and people will perform to your expectations."
Open full entry →A manager expects a team to fail and provides less support, causing failure.
Leadership beliefs shape outcomes through behavior.
Set high expectations and provide the support to meet them.
We attribute success to ourselves and failures to external factors.
"I won because of skill. I lost because of bad luck."
Open full entry →A leader takes credit for wins and blames the market for losses.
Self-serving bias corrupts learning and accountability.
Use external data and peer review for attributions.
What is considered normal changes gradually, making degradation invisible.
"Each generation accepts a slightly worse normal."
Open full entry →Customer service quality declines slowly until '3-day response' feels normal.
Baselines drift unless you compare to historical standards.
Define and revisit objective baselines regularly.
Institutions will try to preserve the problem to which they are the solution.
"The fire department wants fires. The consultant wants complexity."
Open full entry →A compliance team expands rules to justify its growth.
Self-preservation can conflict with mission success.
Measure teams by problem reduction, not activity.
The ratio of useful information to irrelevant information.
"More data is not more insight. Often it is just more noise."
Open full entry →A dashboard with fifty metrics hides the three that matter.
Information overload reduces decision quality.
Identify the few signals that matter and filter the rest.
A trend appears in different groups but disappears or reverses when groups are combined.
"The aggregate can lie about the parts. The parts can lie about the aggregate."
Open full entry →A treatment helps men and women separately but appears harmful overall.
Aggregated metrics can hide important subgroup effects.
Analyze data at multiple levels of aggregation.
We look to others to determine correct behavior in uncertain situations.
"If everyone is doing it, it must be right. Or at least safe."
Open full entry →Customers choose a busy restaurant over an empty one.
Testimonials, reviews, and usage numbers drive adoption.
Question whether the crowd actually knows what is right.
Small changes that are not noticeable can add up to a significant change.
"At what point does a beard become a beard? One hair at a time."
Open full entry →A culture degrades through a series of small, unremarkable decisions.
Gradual change is hard to detect and harder to reverse.
Set thresholds and review trends, not just snapshots.
Effects of an intervention spread to other areas beyond the intended target.
"Fix one thing, break another. Or help another."
Open full entry →A new sales process improves one region but creates chaos in another.
Local changes have systemic consequences.
Map second-order effects before rolling out changes.
We prefer things to stay the same rather than change.
"Better the devil you know, even if you do not like him."
Open full entry →A company sticks with legacy software because switching feels risky.
Change requires overcoming inertia and loss aversion.
Make the status quo cost more than the change.
Stocks are accumulations; flows are rates of change that affect them.
"You cannot understand a bathtub by watching the faucet alone."
Open full entry →Cash, inventory, and reputation are stocks fed by inflows and drained by outflows.
Managing stocks requires managing flows, not just levels.
Map the inflows, outflows, and feedback loops for every key stock.
Past investment should not influence future decisions.
"It is gone. The only question is whether the next dollar is worth it."
Open full entry →Continuing a failing project because so much has already been spent.
Sunk cost logic destroys capital allocation.
Ask: 'If we were starting today, would we fund this?'
We focus on those that survived and ignore those that did not.
"The winners wrote the history. The losers are silent."
Open full entry →Studying successful startups without looking at failed ones.
Success stories are biased samples.
Study failures and build failure databases.
Accidents occur when multiple layers of defenses fail simultaneously.
"Every layer has holes. Catastrophe finds the alignment."
Open full entry →A plane crash requires several safeguards to fail at once.
Risk management is about layers, not single controls.
Add independent layers and monitor near-misses.
People defend and rationalize the existing social system.
"The system is flawed, but at least it is our flawed system."
Open full entry →Employees defend unfair policies because they feel invested in the company.
System justification resists change and reform.
Create psychological safety for criticizing the system.
Knowledge that is hard to transfer because it is personal and experience-based.
"You cannot learn to ride a bike by reading a manual."
Open full entry →A master craftsperson's skill is difficult to document or teach.
Tacit knowledge walks out the door when experts leave.
Create apprenticeship, mentoring, and knowledge-capture rituals.
Goals become the focus, sometimes at the expense of the underlying purpose.
"Hit the target, miss the point."
Open full entry →A support team closes tickets quickly but leaves customers unsatisfied.
Targets can distort behavior if not designed carefully.
Pair targets with quality and outcome measures.
Cherry-picking data to fit a pattern after the fact.
"Draw the target around the bullet holes and call yourself a marksman."
Open full entry →Highlighting a strategy that worked in one region while ignoring the regions where it failed.
Post-hoc pattern finding is not prediction.
Test patterns on new data and require pre-registration.
The ability to attribute mental states to others and understand their perspectives.
"Negotiation is chess with emotions."
Open full entry →A leader anticipates how a reorganization announcement will land.
Empathy and perspective-taking are core leadership skills.
Practice perspective-taking before communicating decisions.
A neutral account of a conflict that both sides can agree on.
"Your story and their story are both incomplete. The third story is the room's view."
Open full entry →A mediator reframes a dispute as a shared problem rather than a battle.
Conflict resolution starts with a shared narrative.
Ask both parties to describe the third story before negotiating.
Our decisions are influenced by when events occur or when we evaluate them.
"The timing of a question changes the answer."
Open full entry →A decision made at the end of a long meeting differs from one made fresh.
Meeting timing and decision fatigue shape outcomes.
Schedule critical decisions when people are fresh and alert.
Shared resources are overused when individuals act in their own interest.
"Everyone took a little extra. Nothing is left."
Open full entry →Engineering capacity and brand reputation are depleted by unmanaged use.
Commons need ownership and pricing.
Assign clear ownership and charge for shared resources.
A small group can dominate when the majority is silent or divided.
"The loudest 10% can sound like the whole room."
Open full entry →A vocal minority of customers shapes a product roadmap.
Listening to the loudest voices can misrepresent the real majority.
Survey the silent majority and weight input by impact.
Binding yourself now to avoid future temptation.
"Tie yourself to the mast before the sirens sing."
Open full entry →An automatic retirement contribution prevents future spending temptation.
Pre-commitment mechanisms help organizations stick to long-term plans.
Build hard constraints that protect long-term goals.
Negative behavior of outgroup members is attributed to character; positive behavior to situational factors.
"The other tribe is bad by nature. We are good by circumstance."
Open full entry →A rival's success is 'luck'; their failure is 'incompetence'.
Competitive analysis is distorted by group attribution.
Apply the same attribution standards to rivals and allies.
Actions have effects that were not planned or anticipated.
"Every intervention has a shadow."
Open full entry →A well-meaning policy creates a loophole that makes things worse.
Second-order effects are the rule, not the exception.
Pre-mortem and red-team policies before rollout.
Items that stand out are more likely to be remembered.
"The odd one out is the one that sticks."
Open full entry →A single red item in a list of black items is remembered first.
Differentiation drives memory and attention.
Make key messages visually or conceptually distinctive.
Aggregated independent judgments can be more accurate than individual experts.
"A thousand guesses average closer to the truth than one expert guess."
Open full entry →Prediction markets forecast elections better than pundits.
Diverse, independent opinions improve forecasting.
Aggregate judgments before group discussion to avoid herding.
We prefer to reduce a small risk to zero over a greater reduction in a larger risk.
"Eliminating the last 1% feels better than cutting a big risk by half."
Open full entry →Spending heavily to eliminate a rare failure while ignoring common hazards.
Zero-risk bias distorts safety and compliance spending.
Compare total risk reduction, not just whether a risk reaches zero.
One party's gain is exactly another party's loss.
"For me to win, you must lose. A cramped worldview."
Open full entry →A negotiation framed as dividing a fixed pie.
Most business is positive-sum; zero-sum framing limits value creation.
Look for integrative solutions that expand the pie.
Deriving general rules from specific examples; the leap from instance to concept.
"A 'ball' is more abstract than 'this leather soccer ball'."
Open full entry →Treating 'customer' as a unified concept when you actually serve five distinct segments.
Strategy lives or dies by the right level of abstraction.
Periodically zoom in to concrete instances and verify the abstraction still fits.
Holding a different — and correct — set of tools than everyone else.
"Consensus pays scale. Divergence pays alpha."
Open full entry →Buying when everyone is selling; specializing where everyone generalizes.
Sustainable edge requires being right and non-consensus.
Catalog where your view differs from the room — then test whether you're right or just contrarian.
Presuming a purposeful actor behind events that may have no actor at all.
"Our ancestors who saw lions in the grass lived. Those who saw grass died."
Open full entry →Blaming a competitor's 'master plan' for what was actually a market accident.
Strategic paranoia outpaces strategic reality.
Always rule out randomness and emergence before assigning intent.
Forgetting to compare an offer with the next-best alternative.
"A great deal compared to what?"
Open full entry →Approving a vendor renewal because the price 'looks good' without re-bidding.
Every yes is implicitly a no to the next option you didn't price.
Require at least one named alternative on every material decision.
Preferring options with known probabilities over options with unknown ones.
"We pay a premium just to know the odds."
Open full entry →Sticking with a familiar product even when the unknown one is statistically better.
Innovation budgets bleed quietly to ambiguity aversion.
Estimate the unknowns explicitly — even rough ranges beat hand-waving.
Attributing human traits, emotions, or intentions to non-human entities.
"The algorithm doesn't 'want' anything. You projected that."
Open full entry →Treating an AI model as if it has goals; treating a market as if it has moods.
Strategy built on metaphors leads to category errors.
Replace human-verbs ('wants', 'thinks') with mechanism language.
Judging an argument true or false based on whether the conclusion is desirable.
"Wishing it weren't true doesn't make it untrue."
Open full entry →'We can't say the project is failing — morale will collapse.'
Suppressing inconvenient truths to preserve momentum.
Separate the evidence question from the action question.
Claiming something is true or better because most people believe it.
"A billion flies can be wrong."
Open full entry →'Every competitor is doing AI agents, so we must too.'
Strategy by herd is strategy by accident.
Ask what the majority actually knows that you don't.
Concluding that a claim is false because the argument for it is flawed.
"Bad argument, good conclusion. It happens."
Open full entry →Dismissing a sound proposal because the deck had a logical error.
Throwing out the insight with the slide.
Steel-man the conclusion independently of the argument given.
'I can't imagine how this is true, therefore it isn't.'
"Reality is under no obligation to be intuitive."
Open full entry →Senior leaders dismissing AI capability gains because the magnitude 'doesn't make sense'.
Personal incredulity is the slowest moat in business.
Replace 'I can't believe' with 'show me the mechanism'.
Saying it often enough until objections fade.
"Ad nauseam is not a proof."
Open full entry →A talking point that becomes 'true' inside the company because nobody contests it anymore.
Strategic narratives ossify through repetition, not evidence.
Periodically re-litigate the assumptions everyone has stopped questioning.
Drawing a conclusion from the absence of evidence rather than its presence.
"No news is not news."
Open full entry →'They haven't responded to our pricing change, so they must be fine with it.'
Silence is rarely consent in commercial relationships.
Convert silence into a question — actively probe for response.
Disagreement grows more extreme as the parties think more about the issue.
"More thinking, more entrenched."
Open full entry →Two factions in a strategy debate move further apart after each meeting.
Long deliberations can harden positions instead of resolving them.
Force structured perspective-swapping — argue the other side.
Replacing a hard question with an easier one and answering that instead.
"'Is this a good investment?' quietly becomes 'do I like the founder?'"
Open full entry →Hiring on likability when you meant to hire on capability.
Most gut decisions are answers to substituted questions.
Write down the actual question before discussing the answer.
Systematic errors in explaining the causes of behavior — yours or others'.
"My failures are circumstantial. Yours are characterological."
Open full entry →A missed deadline is 'context' for me, 'incompetence' for you.
Performance reviews encode this bias unless explicitly designed against it.
Use the same causal language for self and others.
Attributing greater accuracy to the opinion of an authority figure.
"The HiPPO (highest-paid person's opinion) wins, regardless of evidence."
Open full entry →A junior analyst's correct objection gets overruled by a senior's gut.
Authority filters out the very dissent leaders need.
Have leaders share opinions last; require the lowest-rank dissent first.
Favoring suggestions from automated systems over conflicting human judgment.
"If the dashboard says it, it must be true."
Open full entry →Ignoring a sales rep's intuition because the forecast model disagrees.
AI-era decision-making is structurally vulnerable to this bias.
Pair every model output with the question: 'What would override this?'
Relying on examples that come to mind easily, not on actual frequency.
"The vivid story beats the boring statistic."
Open full entry →Overestimating risk of plane crashes after one is in the news.
Strategic priorities skew toward whatever was on the call this week.
Anchor decisions to base rates before recent anecdotes.
A belief gains plausibility through public repetition, not new evidence.
"Repeat the rumor often enough and it becomes a fact."
Open full entry →Recurring narratives in business press that drive 'consensus' without data.
Trends become 'inevitable' purely through repetition.
Trace each belief to its first source. Often there isn't one.
Ignoring the general frequency in favor of specific, vivid information.
"The story crowds out the statistic."
Open full entry →Hiring a 'rockstar' from a category where most attempts fail.
Strategic bets ignore industry base rates of success and failure.
Force the base-rate question: 'What % of attempts like this succeed?'
Update beliefs in proportion to the strength of new evidence.
"Beliefs are bets. New evidence is the table tilting."
Open full entry →Revising a sales forecast as the quarter develops, not just at quarter-end.
Strategic posture should evolve continuously, not in cliffs.
Document prior + update on every major call. Compare to outcome.
Adding the word 'because' (with any reason) increases compliance dramatically.
"The word 'because' is a social cheat code."
Open full entry →'Can I cut in line because I need to make copies?' works almost as well as a real reason.
Internal requests with stated rationale move faster, even when the rationale is thin.
Audit your own compliance — are you accepting reasons, or just the word 'because'?
Evaluating an argument's logic based on whether you agree with the conclusion.
"If the answer feels right, the logic must be right."
Open full entry →Accepting flawed reasoning for a conclusion you already held.
Most strategy debates are belief bias dressed as analysis.
Evaluate the logic with the conclusion hidden, then reveal it.
We come to like people we've done a favor for, more than people who've helped us.
"Ask a small favor — you'll be liked more, not less."
Open full entry →Asking a skeptical colleague for input quietly builds an ally.
Strategic relationship-building runs backwards from intuition.
Routinely ask for small, specific help from people whose alignment you need.
Passion is inversely proportional to the amount of real information available.
"The less anyone knows, the more violently they argue."
Open full entry →Strategy debates about distant futures generate the loudest opinions.
Conviction often signals the absence of evidence, not its presence.
Calibrate confidence to the actual evidence available.
Subconscious preference for numbers (and letters) that appear in our own name or birthday.
"Implicit egotism, hiding in plain sight."
Open full entry →Investors mildly preferring tickers that share initials with them.
Tiny biases compound in high-volume decisions like hiring or pricing.
Strip identifying numbers from option sets when possible.
A system's throughput is constrained by its single slowest step.
"Optimize everything except the bottleneck and you've optimized nothing."
Open full entry →Adding engineers when the bottleneck is product decisions.
Find the bottleneck or you will spend money in the wrong place.
Apply Theory of Constraints quarterly: identify, exploit, subordinate, elevate.
Remembering more context around a scene than was actually present.
"Memory is a generative model, not a recording."
Open full entry →Witnesses 'recall' details that weren't in the room.
Post-mortems get worse, not better, the further from the event.
Capture decisions and observations in writing, in real time.
Decisions are constrained by available information, cognitive limits, and time.
"We don't optimize. We satisfice."
Open full entry →Choosing the first acceptable option rather than the best one.
Real decision systems are bounded — design them for that, not for ideals.
Build decision processes that minimize required cognition under pressure.
The mind can be socially influenced toward conclusions that bypass scrutiny.
"Cults and corporate cultures share more techniques than either admits."
Open full entry →Onboarding programs that shape worldview faster than skills.
Strong cultures can quietly homogenize judgment.
Cultivate productive heretics. Protect dissent structurally.
Offering value in exchange for influence over a decision.
"Most bribery in organizations is legal and called something else."
Open full entry →Vendor incentives that quietly steer enterprise procurement.
Watch for legal forms of influence — meals, trips, sponsorships, swag.
Disclose and rotate; what's hidden is what corrupts.
Small visible disorders signal that bigger ones will be tolerated.
"Tolerate the small stuff and the big stuff arrives next."
Open full entry →A messy codebase accumulates more mess. A late-meeting culture spreads.
Standards decay at the level of the smallest thing tolerated.
Repair the small breakage immediately. It's a leading indicator.
Assuming the opponent is wrong, then explaining why they came to that wrong belief.
"Skip the argument, attack the psychology."
Open full entry →'You only think that because you're an engineer.'
Common in cross-functional disputes — and intellectually empty.
Address the argument before its source.
Deliberate, sustained effort to damage someone's reputation.
"When you can't beat the argument, smear the arguer."
Open full entry →Internal politics replacing the substantive case.
Toxic organizations resolve disputes by character, not by data.
Norm the team toward addressing arguments only. Sanction smears.
When a system in equilibrium is disturbed, it shifts to counteract the change.
"Push the system; it pushes back."
Open full entry →Cut headcount; remaining work expands until the system stresses again.
Most 'efficiency' gains get absorbed by systemic counter-reactions.
Anticipate the rebound. Design changes that the system can't reabsorb.
Knowledge from someone who can recite the answers but doesn't understand them.
"Munger's tale: Planck's chauffeur could give the lecture — but couldn't answer the question."
Open full entry →Advisors who repeat frameworks without understanding when they break.
Most consulting suffers from chauffeur knowledge at scale.
Probe with follow-up questions. Real knowledge survives them; recited knowledge doesn't.
People appear more attractive in a group than individually.
"Average faces blend favorably in clusters."
Open full entry →Stock pitches that look stronger as a portfolio than picked apart one by one.
Bundled proposals hide individually weak items.
Evaluate options individually before evaluating the set.
Inputs combine under conditions to produce new outputs — sometimes irreversibly.
"The right ingredients in the wrong order is the wrong result."
Open full entry →Combining incentives, talent, and capital — order and timing matter.
Strategy is recipe design, not ingredient acquisition.
Sequence interventions like reactions: temperature, catalyst, order.
Adults can't recall early childhood; the memories never consolidated.
"Some formative experiences shape us without being remembered."
Open full entry →Founders' earliest experiences shape risk tolerance invisibly.
Cultural founding events shape orgs long after they're forgotten.
Document founding decisions — they outlive the people who made them.
Remembering past choices as better than they were, in proportion to commitment.
"The yes you made yesterday looks better today than it really was."
Open full entry →Defending a failing initiative because 'we chose it for good reasons'.
Capital reallocation gets blocked by retroactive self-justification.
Re-evaluate as if you were starting from scratch today.
Temporal illusion where the first moment after a fast event seems stretched.
"The second hand that pauses just a beat too long."
Open full entry →First impressions in interviews carry disproportionate weight in memory.
Initial-impression bias contaminates structured evaluation.
Anchor evaluations in standardized criteria, not first-impression memory.
The rate at which customers (or employees) leave over a period.
"You can't outgrow what you can't keep."
Open full entry →A SaaS business with 5% monthly churn loses 46% of its base annually.
Most growth strategies fail because churn isn't fixed first.
Plug the bucket before scaling the inflow.
Higher rates of mistreatment toward stepchildren than biological children.
"Group membership predicts treatment more than we admit."
Open full entry →Acquired teams routinely under-resourced versus 'home-grown' ones.
M&A integrations often replicate the Cinderella effect culturally.
Audit resource allocation between 'native' and 'acquired' groups.
Sufficiently advanced technology is indistinguishable from magic.
"Today's miracle is tomorrow's API call."
Open full entry →Generative AI looked like magic in 2022; was infrastructure by 2025.
Strategic timing depends on knowing where on the magic-to-infrastructure curve you are.
Forecast technologies as 'how soon does this become boring?' not 'how impressive is this?'
Seeing patterns in random data.
"The streak is in the dice, but the meaning is in your head."
Open full entry →Reading three good quarters as a trend; reading three bad ones as crisis.
Most 'momentum' calls are clustering illusion.
Require statistical significance, not just visual sequence.
Systematic deviations from rationality in judgment.
"Biases aren't bugs in thinking — they're features that misfire."
Open full entry →Recency, anchoring, availability — operating below the level of awareness.
Decision systems either account for bias or are corrupted by it.
Build process — not willpower — to counter known biases.
Psychological stress from holding contradictory beliefs; usually resolved by changing the easier one.
"When facts disagree with identity, identity wins."
Open full entry →Doubling down on a wrong decision because admitting error is more painful.
Most strategic errors persist because reversing them is dissonance-painful.
Make admitting-wrong cheap; make persisting-wrong expensive.
Striking pattern that is statistically expected in large samples.
"In a big enough sample, the miraculous is mandatory."
Open full entry →Two competitors launching similar features the same week.
Don't build strategy around 'too unlikely to be random' patterns.
Compute the actual probability before assigning meaning.
Treating multiple data points as independent when they came from one source.
"Three articles, one wire story."
Open full entry →Multiple reports 'confirming' a trend that all cite the same survey.
Triangulation is fake if all sources upstream are the same.
Trace every data point to its primary source.
Complements raise each other's value; substitutes lower it.
"Find your complement. Avoid being someone's substitute."
Open full entry →Cloud + AI are complements; horse + car were substitutes.
Strategic positioning is largely about which side of this you're on.
Map every key partner and competitor as complement or substitute.
Many interacting parts producing emergent behavior nobody designed.
"Sum of parts ≠ behavior of whole."
Open full entry →Markets, organizations, ecosystems — none reducible to their components.
Strategy that ignores emergence will be surprised by the system.
Model interactions, not just components. Run small experiments.
Assuming what's true of a part is true of the whole.
"Every brick is light. The wall is not."
Open full entry →'Every team hit its goal — so the company hit its goal' (it didn't).
Cascaded OKRs frequently produce composition errors.
Validate aggregates separately from components.
Associating a neutral stimulus with a meaningful one until the neutral one triggers the response.
"Pavlov's dog isn't extinct. It works in your office every day."
Open full entry →Customers conditioned to expect discounts every quarter.
Unintended conditioning shapes employee and customer behavior at scale.
Audit which signals are conditioning which responses — and stop the harmful ones.
Behavior shaped by reinforcement and punishment over repeated trials.
"What gets rewarded gets repeated. What gets punished hides."
Open full entry →Bonus structures shape behavior far more than mission statements.
Every comp plan is an operant conditioning program — designed or not.
Reward the behavior you actually want, not the proxy for it.
Producing fabricated memories or explanations without intent to deceive.
"Your brain hates 'I don't know' and will invent the answer."
Open full entry →Confident post-hoc explanations for decisions made on gut.
Most leadership 'lessons learned' are confabulation.
Capture decision rationale at the time of the decision, not after.
Exploiting trust to defraud — only works because the mark wants to believe.
"Every con requires a willing audience."
Open full entry →Investor frauds that scaled because skepticism was 'rude'.
Trust is a moat — and an attack surface.
Verify in proportion to consequence, not in proportion to discomfort.
Seeking, interpreting, and remembering information that confirms what we already believe.
"We don't gather evidence. We hire it."
Open full entry →Strategy reviews that surface only data supporting the existing plan.
Most analytics in companies confirm rather than test.
Pre-register hypotheses. Reward dissent with evidence.
A hidden variable that influences both supposed cause and supposed effect.
"Ice cream and drowning correlate. Summer is the confounder."
Open full entry →'Customers who use feature X retain better' — but they were already power users.
Most retention 'drivers' are confounded with cohort selection.
Test causally, not correlationally. Control for cohorts and timing.
Testing hypotheses only by looking for confirming evidence.
"If you only look for proof, you'll find it."
Open full entry →Validating a product hypothesis by interviewing existing happy customers.
Most user research confirms the brief rather than testing it.
Design tests that could disprove the hypothesis.
Insufficiently updating beliefs when given new evidence.
"Your priors are sticky. New data bounces off."
Open full entry →Forecasts that lag reality by a quarter or two even with clear signal.
Strategic posture often updates slower than the market does.
Set update thresholds in advance. Force documented revisions.
Behaviors spread through groups via observation and imitation.
"What spreads in the room is more than ideas."
Open full entry →Late-arrival norms, deadline-slip norms, working-weekend norms.
Culture is the equilibrium of contagious behaviors.
Notice what you tolerate; that's what propagates.
Emotions spread between people, often unconsciously.
"Walk into a tense room and you become tense."
Open full entry →A panicked CEO produces a panicked org within a week.
Leadership affect is a key environmental variable.
Regulate your own state. It's broadcasting whether you mean it to or not.
Symptoms or beliefs spread through a group with no underlying physical cause.
"Sometimes the disease is the belief."
Open full entry →Mass tech-stack panic about a 'doomed' framework that's actually fine.
Investor and employee panic can be contagious without basis.
Anchor to evidence quickly when narratives accelerate.
Ideas, behaviors, and attitudes spread through social networks.
"Networks transmit more than messages."
Open full entry →Quiet quitting, return-to-office sentiment, AI adoption — all socially contagious.
Network structure shapes strategic outcomes as much as content.
Map influence networks. Trends seed at hubs.
Evaluations are warped by what came immediately before.
"Show the $5,000 watch first. The $500 one feels cheap."
Open full entry →Sales decks anchor with the premium tier to make the middle look reasonable.
Pricing and negotiation are largely contrast engineering.
Evaluate options against absolute criteria, not against each other.
Coordinated action that produces outcomes unavailable to individual actors.
"Cooperation is the cheat code that solves prisoner's dilemmas."
Open full entry →Industry standards bodies, open-source ecosystems, alliances.
Many competitive strategies are actually cooperation strategies.
Identify where structured cooperation beats pure competition.
Fixed costs don't scale with output; variable costs do.
"Operating leverage is fixed costs in disguise."
Open full entry →Software has high fixed, low variable cost — hence high gross margin at scale.
Cost structure determines strategy more than strategy determines cost.
Map every line as fixed vs. variable. Re-architect deliberately.
Imagining what could have happened instead of what did.
"Strategy is comparison to what didn't happen."
Open full entry →'Without that pivot, we'd have run out of cash six months later.'
Counterfactuals are how we separate luck from skill.
Document counterfactuals before outcomes are known.
Winning the disputed population, not just defeating the visible opponent.
"The battle is for legitimacy, not territory."
Open full entry →Internal change programs succeed or fail with the middle, not the loud minority.
Most change resistance is structural, not personal.
Build legitimacy with the uncommitted middle first.
Countering hostile narratives with truthful, well-timed alternatives.
"You can't kill a story with silence. Replace it."
Open full entry →Companies that get ahead of bad news with accurate framing.
Narrative control is a defensible asset.
Pre-stage truthful responses to predictable narrative attacks.
Giving polite rather than honest answers to avoid offense.
"Politeness corrupts more research than fraud does."
Open full entry →Customer interviews where everyone says they 'love' the feature they won't use.
Customer-feedback systems systematically over-report satisfaction.
Use behavioral data over self-reported data. Make dissent comfortable.
The threshold at which a system becomes self-sustaining.
"Below the line, you push. Above the line, it pulls."
Open full entry →Platform marketplaces — below critical mass, sellers leave; above it, they multiply.
Many strategies require getting past a threshold before they make sense.
Identify and over-invest until critical mass; don't ramp evenly.
We recognize faces from our own race more accurately than others.
"The brain pattern-matches what it has most data on."
Open full entry →Eyewitness identification errors compound by race.
Hiring and customer-recognition systems inherit the bias.
Diversify exposure intentionally; use structured identification protocols.
Influencing the beliefs and actions of a crowd through psychological techniques.
"A crowd is a different organism than its members."
Open full entry →Town halls and all-hands have crowd dynamics distinct from 1:1s.
Communication that works 1:1 can backfire at scale.
Design large-group communication for crowd psychology, not individual rationality.
Experiencing a remembered idea as if it were original.
"Your great idea may be someone else's, forgotten."
Open full entry →'Original' strategies that turn out to have been heard at a conference last year.
Strategic novelty is often unacknowledged recall.
Cite sources even when you think you don't have one. Write down where ideas came from.
Failure to recall when the retrieval cue is absent.
"The memory is there. The key isn't."
Open full entry →Walking into another room and forgetting why.
Information silos persist because context cues don't transfer.
Design knowledge systems that travel with context, not just content.
The best way to get a right answer online is to post a wrong one.
"People correct faster than they help."
Open full entry →Internal docs that improve when a wrong draft circulates.
Sometimes a confidently wrong draft beats a perfect ask.
Use 'strawman' drafts to harvest dissent and correction.
The drive to explore and understand for its own sake.
"Curiosity is the cheapest source of edge."
Open full entry →Senior leaders who stay curious make better long-horizon calls.
Curiosity-driven cultures outperform compliance-driven ones over time.
Reward question-asking, not just answer-giving.
Experts can't imagine not knowing what they know.
"Once you know it, you can't un-know it — or explain to those who don't."
Open full entry →Senior engineers who can't teach juniors because the gap is invisible to them.
Most internal communication suffers from curse of knowledge.
Test understanding with novices before broadcasting.
Believing that society or one's institution is in inexorable decline.
"The golden age was always twenty years ago."
Open full entry →'The company isn't what it used to be' — usually said throughout its history.
Declinism corrodes morale and self-fulfilling prophecy follows.
Test 'decline' claims against data, not against nostalgia.
People disproportionately stick with the default option.
"Whoever sets the default wins."
Open full entry →Opt-out organ donation vs. opt-in produces opposite societal outcomes.
Defaults are the most under-leveraged design surface in most products.
Choose defaults intentionally. The default IS the policy.
Unconscious psychological strategies that protect self-image.
"Denial, projection, rationalization — the unholy trinity of org politics."
Open full entry →A failing initiative gets reframed as 'strategic learning' to protect identity.
Most resistance to change is defense mechanism, not disagreement.
Separate identity from initiative. Make failure safe to acknowledge.
Attributing causes to protect oneself from blame or vulnerability.
"When the failure could happen to anyone, we blame the victim hardest."
Open full entry →Blaming a colleague's failure on their character to feel immune ourselves.
Post-mortem culture is defensive attribution unless engineered otherwise.
Blameless post-mortems by structural mandate.
Seeing every problem through the lens of one's profession.
"To the lawyer, every solution is a contract."
Open full entry →Engineers solve culture problems with tools. Marketers solve them with messaging.
Functional bias shapes strategy debates more than data does.
Force cross-functional framing on every major decision.
Eroding the will to act, even when capacity remains.
"Defeat is in the mind before it's on the field."
Open full entry →Talent attrition that compounds because remaining staff lose faith.
Most company failures are demoralization, not capability collapse.
Protect morale as an asset. It's slower to rebuild than to lose.
Refusing to accept reality, despite evidence.
"The first stage of any major change."
Open full entry →Leaders who refuse to acknowledge a category shift until it's too late.
Strategic denial is a leading indicator of strategic failure.
Force the worst-case scenario into planning, even when nobody wants to discuss it.
We spend less when holding large bills than small ones — same money, different behavior.
"A $100 bill feels different from five $20s."
Open full entry →Capital budgets denominated in millions are spent more cautiously than the same in thousands.
Granularity of measurement changes behavior.
Choose units that match the decision discipline you want.
If A then B; not A; therefore not B — invalid.
"Just because that path leads there doesn't mean other paths don't."
Open full entry →'If we hire senior engineers, quality improves. We didn't hire seniors, so quality won't improve.'
Causal monocultures in strategy debates.
List all paths to the outcome, not just the one under discussion.
Munger's principle: the surest way to get something is to deserve it.
"Earn the result. The shortcut path is the long path."
Open full entry →Building real capability beats positioning for the role you want.
Sustainable career and company strategy.
Ask: 'What would make us obviously deserving of this outcome?'
Designing systems for the lowest-capability user produces resilience for everyone.
"If your system requires geniuses, it will fail with mortals."
Open full entry →Curb cuts: built for wheelchairs, used by parents, delivery workers, travelers.
Robust org systems work with average performers, not just stars.
Stress-test processes against the median user, not the ideal one.
Applying higher scrutiny to evidence we disagree with than to evidence we agree with.
"Friendly data gets a pass. Hostile data gets the audit."
Open full entry →Strategy reviews that pick apart bear cases more carefully than bull cases.
Asymmetric scrutiny produces asymmetric conclusions.
Apply equal-rigor reviews to both supporting and opposing evidence.
Actively seeking evidence that would disprove your hypothesis.
"Darwin kept a notebook for facts that contradicted his theory."
Open full entry →Founders who pre-mortem against their own thesis quarterly.
Strategic conviction without disconfirmation discipline is faith.
Maintain a written list of what would change your mind. Update it.
Deliberately false information spread to deceive.
"Worse than wrong: weaponized wrong."
Open full entry →Coordinated narratives planted in markets or politics.
Reputation defense requires disinformation literacy.
Build rapid-response capacity. Distinguish from honest disagreement.
We dismiss the ideas and merits of people we dislike.
"The messenger doesn't change the message — but we let it."
Open full entry →A correct objection ignored because the source is disliked.
Information from disliked people is systematically devalued.
Evaluate ideas on a separate axis from their source.
Selling winners too early and holding losers too long.
"Realize gains; defer the pain."
Open full entry →Investors who lock in 10% gains and ride 50% losses to zero.
Project portfolios suffer the same pattern as stock portfolios.
Apply equal-rigor stop-loss discipline to winners and losers.
Two options seen side-by-side look more different than they are in isolation.
"Comparison amplifies differences that won't matter later."
Open full entry →Agonizing between two job offers that will feel identical in six months.
Choice architecture distorts perceived differences.
Evaluate each option independently first.
Reasoning in distributions — ranges and probabilities — rather than points.
"Single-point forecasts are statements of preference, not knowledge."
Open full entry →Revenue forecasts as P50/P90 ranges rather than single numbers.
Strategic decisions made on means hide tail risks.
Require distribution-shaped forecasts on every major call.
Insights from one domain don't automatically transfer to another.
"We're smart in one room, dumb in the next."
Open full entry →Brilliant strategists who make poor personal financial decisions.
Cross-domain transfer requires deliberate work.
Explicitly translate models across contexts. Don't assume the lesson generalizes.
Resolving doubt by jumping to a conclusion — any conclusion — quickly.
"Uncertainty is uncomfortable. Wrong-but-decided feels better."
Open full entry →Snap decisions made under social pressure to 'pick a direction'.
Speed culture amplifies this. Quality culture resists it.
Normalize 'I don't know yet.' Make sitting in doubt acceptable.
Dread weighs roughly double in our calculus what the equivalent gain does.
"We hate losing twice as much as we love winning."
Open full entry →Why customers resist switching even when alternatives are clearly better.
Selling change requires defusing dread, not just promising gain.
Address loss aversion explicitly in change communication.
Substance dependence distorts judgment and accelerates decline.
"Munger's warning: the first step is the only easy one."
Open full entry →Founder burnout patterns enabled by stimulant misuse.
Wellbeing infrastructure is risk management.
Build cultures that make help-seeking safe.
~150 — the cognitive limit on stable social relationships.
"Above 150, you have a directory, not a tribe."
Open full entry →Org structures that retain coherence below ~150, fragment above.
Scaling org design must account for the 150-person inflection.
Design deliberate sub-tribes when crossing Dunbar's threshold.
We remember peaks and ends, not the duration in between.
"A great finale rewrites a mediocre middle."
Open full entry →Customer experience design that invests in moments, not minutes.
Peak-end shapes NPS more than average satisfaction does.
Engineer the peak and the end. Defend them.
Inability to think rationally despite adequate intelligence.
"Smart people are very good at being wrong elaborately."
Open full entry →Brilliant analysts who fall for crypto scams; PhDs who endorse pseudoscience.
Hiring for IQ alone doesn't hire for judgment.
Test for rationality and calibration, not just intelligence.
Drawing conclusions about individuals from group-level data.
"Average isn't a person."
Open full entry →'Our customers are 35 years old' — none of them is.
Persona-based product decisions often commit ecological fallacy.
Distinguish group statistics from individual prediction.
Interdependent network of actors evolving together.
"You don't compete with a competitor. You compete with their ecosystem."
Open full entry →iOS vs. Android. Microsoft vs. open-source.
Ecosystem strategy beats product strategy at scale.
Map the full ecosystem before naming your competitor.
We value outcomes more when we worked hard for them.
"Hard-won is over-loved."
Open full entry →Initiatives that survived political battles get defended past their useful life.
Sunk effort feels like sunk cost — and acts like it.
Decouple evaluation of an initiative from the effort spent on it.
Over-weighting one's own perspective when reconstructing events.
"I remember the meeting where I was right."
Open full entry →Credit-claiming asymmetries in retrospective reviews.
Multiple egocentric biases compound across a team's memory.
Capture decisions in writing as they happen. Compare to memory later.
Cognition is shaped by the body, environment, and physical state.
"You think differently standing than sitting."
Open full entry →Walking meetings produce different decisions than seated ones.
Workplace design is a cognitive intervention.
Design environments for the thinking they're meant to produce.
What we wear influences how we think and perform.
"The lab coat makes the scientist more attentive."
Open full entry →Formal attire increases abstract thinking; casual increases creativity.
Dress codes are subtle cognitive interventions.
Match dress norms to the cognitive style you want from the work.
The brain minimizes effort by default — most cognition is on cruise control.
"Thinking is expensive. We avoid it whenever we can."
Open full entry →Defaults dominate behavior because thinking is metabolically costly.
Most user behavior is energy-minimization in disguise.
Design for the lazy user. They're everyone, most of the time.
Systems tend toward disorder unless energy is invested to maintain order.
"Order is rented, not owned."
Open full entry →Codebases, organizations, and processes all decay without active maintenance.
Quality requires continuous investment, not one-time effort.
Budget for entropy. The fight against it is permanent.
We measure ourselves against peers, not against our past selves.
"Munger: 'It's not greed that drives the world, but envy.'"
Open full entry →Comp negotiations driven by what peers earn, not by absolute value.
Relative status drives more behavior than absolute outcomes.
Design comp systems aware of relative comparison, not just absolutes.
Systems maintain stability by self-regulating around a setpoint.
"Push the system; it pushes back to its setpoint."
Open full entry →Process improvements that get absorbed by reverted behavior.
Lasting change requires moving the setpoint, not just the current state.
Identify the homeostatic mechanism before changing inputs.
Two things may be equivalent in effect but not in form.
"Different paths, same destination."
Open full entry →A discount and a 'free' add-on can be economically identical.
Strategic options often look different but are equivalent in expected value.
Decompose options to economic essence before comparing.
Using the same word with different meanings in the same argument.
"Define your terms or your terms will define you."
Open full entry →Debates about 'growth' where each side means a different metric.
Most cross-functional disputes are partly equivocation.
Define key terms explicitly at the start of every important discussion.
Remembering past experiences as more positive than they were.
"Nostalgia is a strategic risk."
Open full entry →'The old days' get reconstructed as better than the data shows.
Strategy debates anchored to euphoric recall produce backward strategy.
Use contemporaneous data, not memory, in retrospectives.
Variation, selection, retention — the engine of cumulative change.
"The mechanism that produced you also produces obsolescence."
Open full entry →Product lines, organizational practices, and entire industries evolve by this loop.
Strategy is evolutionary design: variation, selection, retention.
Engineer all three. Don't just generate ideas — select and retain them.
Assuming something exists because we can name or define it.
"The map insists on the territory."
Open full entry →Strategy documents that reference 'the customer' as if the abstraction is a person.
Many strategic plans contain non-existent entities.
Trace every category in a plan to actual, observable instances.
Ignoring the size of a sample or population in our judgments.
"One vivid story beats a thousand silent ones."
Open full entry →Reacting to a single customer complaint the same as to a survey of thousands.
Decision weight should scale with sample weight. Often doesn't.
Always note 'how many?' before reacting to 'what?'
Believing others are motivated by extrinsic rewards while we are motivated intrinsically.
"'They want money. I want meaning.'"
Open full entry →Managers assuming employees only want pay; employees wanting purpose too.
Incentive design built on this bias misses what actually motivates.
Survey actual motivation. Don't assume the asymmetry.
Negative emotions fade faster than positive ones.
"The good old days were less good than you remember."
Open full entry →Past company crises get re-described as 'character-building'.
Risk calibration drifts as old pain fades.
Maintain a written log of past failures. Re-read before similar decisions.
False information presented as legitimate journalism.
"The truth puts its boots on slower than the lie sprints."
Open full entry →Coordinated false narratives that move markets or elections.
Brand and reputation risk include fake-news vectors.
Monitor narrative attacks. Pre-stage truthful responses.
Errors in reasoning that undermine the logic of an argument.
"A fallacy is a wrong answer that looks right."
Open full entry →Strawman, ad hominem, false dilemma — alive in every leadership meeting.
Reasoning quality is the cheapest, highest-leverage improvement available.
Train teams to name fallacies in real time without punishment.
Reasoning that two things are alike based on shallow similarity.
"Apples and oranges are both round. They are not interchangeable."
Open full entry →'AI is like electricity' — useful metaphor, misleading strategic guide.
Most strategic analogies are partially false. Use carefully.
Test analogies by listing where they break down.
Crediting a source or cause that isn't actually responsible.
"We assign reasons to outcomes we can't really explain."
Open full entry →Crediting a marketing campaign for a revenue bump that came from seasonality.
Most attribution in business analytics is partially false.
Test attribution causally, not by temporal proximity.
Assuming that because B followed A, A caused B.
"The rooster crows. The sun rises. The rooster takes credit."
Open full entry →Crediting a new initiative for trends already underway.
Most 'we did X and Y improved' claims are post hoc errors.
Use control groups, holdouts, and causal inference techniques.
Overestimating how much others share our beliefs and behaviors.
"'Everyone agrees with me' usually means 'everyone in my room agrees with me.'"
Open full entry →Strategy decisions based on the assumption that customers want what we want.
False consensus is a leading cause of product failures.
Test assumptions against actual, sampled customer beliefs.
An act committed to look like it was done by someone else.
"Cover your tracks by making them point elsewhere."
Open full entry →Coordinated 'leaks' that misattribute the source.
Competitive intelligence and PR include false-flag risks.
Verify provenance before reacting to attributed actions.
Underestimating how common our positive traits and behaviors are.
"We're all uniquely above average."
Open full entry →Every founder thinking their work ethic is exceptional.
Differentiation strategies based on supposed-rare traits often aren't unique.
Benchmark traits against actual industry baselines.
A strategy to influence behavior by amplifying fear and uncertainty.
"When you can't sell the product, sell the danger of the alternative."
Open full entry →Incumbent vendors fighting open-source by raising risk narratives.
FUD is a recognized competitive technique — both offensive and defensive.
Address FUD with evidence, not with counter-FUD.
We notice what's present more than what's absent.
"The dog that didn't bark is the clue we miss."
Open full entry →Diagnosing org problems by what's there, missing what's structurally missing.
Strategic gaps are often invisible because absence doesn't trigger attention.
Explicitly ask 'what's missing here?' as a standard diagnostic question.
Mind latches onto the first plausible explanation and resists alternatives.
"Munger: 'The mind works like a sperm and an egg — first one in shuts the door.'"
Open full entry →Diagnoses that anchor on the first hypothesis and miss the real cause.
Strategy debates frequently calcify around the first plausible framing.
Force three named hypotheses before discussion proceeds.
Reasoning from foundational truths rather than from analogy or convention.
"Most 'best practices' are unexamined assumptions in a suit."
Open full entry →Musk on rocket cost: decompose to raw materials, rebuild the math.
First principles unlock strategy where convention has trapped everyone.
Annually attack five foundational assumptions in your strategy.
Who, what, when, where, why — the minimum facts for any account.
"Skip a W and you've left the story unfinished."
Open full entry →Incident reports, journalism, project briefs — all built on the Five Ws.
Communication quality requires all five.
Audit briefs and announcements for missing Ws before sending.