Concept
The narrative fallacy
The narrative fallacy, a phrase Kahneman takes from Nassim Taleb, is the mind's assembly of past events into a story with causes that makes the outcome look inevitable. Hindsight is its symptom: afterwards you feel you knew all along, successes become recipes and failures become obvious errors.
Once something has happened, System 1 builds the account of how it happened, selecting the events that point toward the outcome and dropping the ones that pointed elsewhere. The story is coherent, satisfying and mostly invented, because the same events with a different ending would have produced an equally convincing story with different causes. Daniel Gilbert adds that memory itself is reconstructed, filled in with what usually happens, so the story is built from evidence that was partly made up. The fallacy matters because it teaches false lessons: the founder who attributes success to a single decision, the manager who is sure the failure was one person's fault, the person who believes their own life was bound to turn out as it did. The defence is the same as for WYSIATI: treat the feeling of inevitability as a warning that the story was built afterwards, and ask what else could have produced the same outcome.
A real-life example
A founder retells his company's failure as a pricing mistake; the story has causes, a moral and a villain. Four customer calls later, the cause is onboarding, and the pricing story, which had felt like understanding, turns out to have been built entirely after the fact.
How to use it
- 1When an outcome now looks inevitable, assume the story was built afterwards.
- 2Ask what else could have produced the same result, and what the story leaves out.
- 3Be suspicious of recipes drawn from one success and morals drawn from one failure.