Wednesday, January 19, 2022

Conditional Probability

I have just noticed that Scott Alexander's motto for his Astral Codex Ten substack is:

P(A|B) = [P(A)*P(B|A)]/P(B), all the rest is commentary.

In other words, Conditional Probability.  What is the probability of A happening if B has already happened?  A very useful but also tricky field.  

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