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Season 7 · Your brain on money · 7.6

"I knew it" is a trick your memory plays

BeforeunsureAfter"I knew it"
What it is

Hindsight bias is feeling, after something happens, that it was obvious all along. It wasn't. Your memory quietly edits out the uncertainty you actually felt.

False confidenceThe costliest kind
Why it matters

If you believe you "always knew" a crash was coming, you also start believing you can predict the next one. That false confidence is expensive.

GUESSES BEFOREspread outMEMORIES AFTERcluster on the answer
The numbers

Ask ten people before an event what they expect, then ask them a year later what they expected. The later answers cluster much closer to what actually happened, every time.

The real lessonIt was uncertain. That's it.
The trap

Rewriting the past as obvious stops you from learning the real lesson, which is usually that the outcome was genuinely uncertain, not that you missed an obvious sign.

A journal entryDated before you knew
Where you see it

A written decision, dated before the outcome, is the only honest record. Memory alone will always flatter itself.

Try it
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