Artificial Intelligence / AI 0301 · Atom · ~20 seconds
Bayes' Rule
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Bayes' rule computes updated belief from three quantities: how probable the evidence is if the claim holds, the prior, and how probable the evidence is overall.
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Posterior equals likelihood times prior, divided by the evidence's total probability — the counting method, compressed to a formula.
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The count comes first on purpose: whoever owns the counting can rebuild the formula from a napkin.