Logic / Logic 351 · Atom · ~20 seconds
Bayes' Theorem
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State
P(H given E) = P(E given H) × P(H) ÷ P(E). In English: updated belief = how well H predicts the evidence, weighted by how plausible H was, scaled by how common the evidence is overall.
Show
The formula card, with each term labeled in plain words.
Watch for
Bayes is the licensed way to reverse a conditional. The unlicensed way is video 346's warning.