Case file
Congruence Bias
- Filed under
- Too Much Information
The charge
We test whether our favored idea fits instead of trying to find out whether it fails. The question becomes 'Can this be true?' rather than 'Could it be false?'
How it operates
Hypothesis testing defaults to confirmatory search because matching cases are easier to generate. That produces weak tests that let bad ideas survive.
Logged incidents
- Incident 01
A team pilots a feature only with ideal users and concludes demand exists without testing where it breaks.
- Incident 02
A recruiter asks questions that let a candidate demonstrate fit but rarely probes likely weaknesses.
- Incident 03
A strategist checks whether one market segment wants the product without testing who actively rejects it.
What to watch for
Ask yourself: 'Am I trying to verify my hypothesis, or am I running a test that could actually kill it?'
Recommended action
Use falsification testing and disconfirmatory search, as in Wason-style hypothesis testing. Design at least one decisive failure condition in advance.
Known associates
- Confirmation BiasWe seek, interpret, and remember information in ways that support what we already believe.
- Choice-Supportive BiasWe remember the option we chose as better than it really was and the options we rejected as worse than they…
- Selective PerceptionPeople perceive the same evidence differently because expectations, motives, and prior beliefs shape what…
- Observer-Expectancy EffectAn observer's expectations can subtly change what they notice, record, or even elicit from others.
- Ostrich EffectWe avoid information that might be painful, threatening, or shame-inducing, especially when it could force…
- Subjective ValidationA statement feels accurate because it seems personally meaningful, even if it is vague or broadly applicable.
Source of record