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Notes on probability, panic & better guesses
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File 03The Belief Updater

The Belief Updater

Move your mind the right amount.

Set a starting belief, then add evidence and watch it slide — proportionally, never leaping straight to certain. Strong evidence on a low prior still only gets you to “likely.”

Interactivethe belief updaterset a prior, then add evidence
now you believe20%
prior
0% — impossiblecertain — 100%

Add a piece of evidence

You multiply the odds, you don't jump to certainty. Even strong evidence stacked on a low priorlands you at "likely," not "sure."