Definitional Retreat is quietly redefining a term mid-argument. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0223, within the Definition Fallacy family. The core principle: quietly redefining a term mid-argument. In incentive terms, it matters because it changes the payoff people perceive before they choose — which means it can be designed for, or exploited.
Scientific Definition
Quietly redefining a term mid-argument.
Plain-English Definition
Quietly redefining a term mid-argument.
Feynman Explanation
'Strategy' meant one thing on slide three and another on slide seventeen.
Core Principle
Quietly redefining a term mid-argument.
Mechanisms
Quietly redefining a term mid-argument.
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Inputs (Triggers)
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Outputs (Behaviors)
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Behavioral Signature
'Strategy' meant one thing on slide three and another on slide seventeen.
Examples
- 'Innovation' shifts from 'new products' to 'tweaks to existing ones.'
- Strategy clarity dissolves as definitions drift.
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Original analysis from The Incentives Lab — how this element behaves inside real payoff structures.
Why this element matters to incentive design
The mistake with this element is treating it as irrationality. It is almost always a rational response to a payoff nobody wrote down. The mechanism underneath it is straightforward: quietly redefining a term mid-argument. You can recognize it in the field by its signature: 'Strategy' meant one thing on slide three and another on slide seventeen. Every element in the Cognition dimension changes the perceived payoff of an action before the action happens, which is exactly where incentive design has leverage.
How it gets exploited
Left undesigned, strategy clarity dissolves as definitions drift. It is amplified whenever strategy clarity dissolves as definitions drift. Inside organizations that shows up as strategy clarity dissolves as definitions drift. The pattern is the same one Goodhart's Law describes: the measurable proxy attracts the effort, and the purpose behind it quietly loses funding.
How the Lab designs around it
The redesign move is to make the desired behavior observable, remove whatever currently pays for its opposite, and attach the reward to the behavior rather than to the noisy outcome downstream of it. The test of any redesign here is simple: after the change, can you name what the organization is now doing less of? If not, the payoff structure did not actually move.
Famous Experiments
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Design Principles
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Measurement Approaches
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Evidence
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The Perverse Incentive Lens™
How this behavior is exploited — and how to redesign around it.
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Interactive Mini Network
Click any neighbor to re-center the graph and follow the threads of connection.
Knowledge Graph Neighbors
Auto-linked to the rest of the Human Behavior Taxonomy by family, domain, dimension, and shared keywords.
Assuming the conclusion in the premise.
The conclusion is hidden inside the premise.
What's true of the parts is assumed true of the whole.
Because there's no sharp line, no distinction exists.
What's true of the whole is assumed true of the parts.
Constraining the option set to bias the decision.
Insisting on a word's original meaning over its current one.
Treating two things as comparable when they're not.
Assuming the truth must lie between two extremes.
Deriving 'is' from 'ought.'
Changing success criteria whenever the prior criteria are met.
Deriving 'ought' from 'is.'
Where Definitional Retreat is cited in the corpus
Essays, field guides, and diagnostics from The Incentives Lab that apply this element.
- EssayGoodhart's Law in the Real World
How measurable proxies capture judgment.
- EssayThe Perverse Incentives Hiding in Your KPIs
Cognitive shortcuts turned into scorecards.
- ReferenceThe incentive glossary
Definitions for every mental model, bias, and fallacy in the corpus.
- ReferenceThe Periodic Table of Human Behavior
The full 1,267-element map this page belongs to.
Questions about Definitional Retreat
- What is Definitional Retreat?
- Definitional Retreat is quietly redefining a term mid-argument. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0223, within the Definition Fallacy family. The core principle: quietly redefining a term mid-argument. In incentive terms, it matters because it changes the payoff people perceive before they choose — which means it can be designed for, or exploited.
- What is an example of Definitional Retreat?
- Strategy clarity dissolves as definitions drift. The Incentives Lab catalogs everyday, organizational, and historical instances of this element on its Human Behavior Taxonomy™ page (HBT-COG-0223).
- How is Definitional Retreat exploited?
- Strategy clarity dissolves as definitions drift.
- How do you design around Definitional Retreat?
- Name the behavior you want in observable terms, remove what currently pays for the opposite, attach the reward to the behavior rather than a lagging proxy, and publish how you will detect gaming.
- Which behavioral dimension does Definitional Retreat belong to?
- Definitional Retreat is classified in the Cognition dimension (COG) of the Human Behavior Taxonomy™, family "Definition Fallacy", class "Logical Fallacy". Its permanent identifier is HBT-COG-0223 and its evidence grade is B.