Argument from Incredulity is i can't believe it; therefore it isn't true. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0059, within the Relevance Fallacy family. The core principle: i can't believe it; therefore it isn't true. 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
I can't believe it; therefore it isn't true.
Plain-English Definition
I can't believe it; therefore it isn't true.
Feynman Explanation
Personal disbelief is not market evidence.
Core Principle
I can't believe it; therefore it isn't true.
Mechanisms
I can't believe it; therefore it isn't true.
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Inputs (Triggers)
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Outputs (Behaviors)
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Behavioral Signature
Personal disbelief is not market evidence.
Examples
- Boards rejecting disruption signals on instinct.
- Strategy slow to adapt because leadership can't picture the change.
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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
When this element shows up in a diagnostic, the instinct is to train people out of it. Training rarely moves it. The mechanism underneath it is straightforward: i can't believe it; therefore it isn't true. You can recognize it in the field by its signature: personal disbelief is not market evidence. 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 slow to adapt because leadership can't picture the change. It is amplified whenever strategy slow to adapt because leadership can't picture the change. Inside organizations that shows up as strategy slow to adapt because leadership can't picture the change. 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 leverage is not in explaining the behavior to people. It is in changing what the behavior earns.
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.
Saying it enough times until it sounds true.
I can't imagine how it works, therefore it doesn't.
Attacking the person rather than the argument.
It's true because authority says so.
Common sense says so, therefore it's true.
Believing something is true because of the consequences of its truth.
Claiming something is true because it hasn't been proven false (or vice versa).
If it's 'natural,' it's good.
It's better because it's newer.
It's right because it's how we've always done it.
It's true because many believe it.
Asking the other side to disprove an unsupported claim.
Where Argument from Incredulity 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 Periodic Table of Human Behavior
The full 1,267-element map this page belongs to.
- CourseIncentives 101
The free ten-part primer on reading a payoff structure.
Questions about Argument from Incredulity
- What is Argument from Incredulity?
- Argument from Incredulity is i can't believe it; therefore it isn't true. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0059, within the Relevance Fallacy family. The core principle: i can't believe it; therefore it isn't true. 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 Argument from Incredulity?
- Strategy slow to adapt because leadership can't picture the change. The Incentives Lab catalogs everyday, organizational, and historical instances of this element on its Human Behavior Taxonomy™ page (HBT-COG-0059).
- How is Argument from Incredulity exploited?
- Strategy slow to adapt because leadership can't picture the change.
- How do you design around Argument from Incredulity?
- 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 Argument from Incredulity belong to?
- Argument from Incredulity is classified in the Cognition dimension (COG) of the Human Behavior Taxonomy™, family "Relevance Fallacy", class "Logical Fallacy". Its permanent identifier is HBT-COG-0059 and its evidence grade is B.