Case file
Survivorship Bias
- Filed under
- Not Enough Meaning
The charge
Survivorship bias is drawing lessons from the cases that remain visible while missing the failures that disappeared from view.
How it operates
Winners are easier to observe, remember, and imitate than losers, so the sample gets badly distorted.
Logged incidents
- Incident 01
Founders copy unicorn habits while ignoring dead startups with the same habits.
- Incident 02
An investor studies only top-performing funds when evaluating a strategy.
- Incident 03
HR analyzes retained high performers but not people who quietly quit or left.
What to watch for
Ask: Who is missing from this sample, and how would their data change the story?
Recommended action
Do a denominator check and a missing-data audit before inferring lessons.
Known associates
- Mental AccountingMental accounting is treating money or resources differently based on arbitrary labels instead of on total…
- Appeal to ProbabilityAppeal to probability fallacy is assuming that because something could happen or is plausible, it probably…
- Normalcy BiasNormalcy bias is underestimating the possibility and impact of disaster because the present still feels…
- Murphy's Law (as cognitive bias)As a cognitive bias, Murphy's Law is the tendency to overexpect that things will go wrong, often in chains,…
- Zero-Sum ThinkingZero-sum bias is assuming one person's or group's gain must come at another's expense, even when mutual gain…
- Subadditivity EffectSubadditivity effect is assigning higher total probability when a broad category is unpacked into specific…
Source of record