JQuinton comments on More "Stupid" Questions - Less Wrong Discussion
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If you can use Bayes Theorem to see what the evidence does to the probability of a hypothesis, can you also use BT to see what happens to the hypothesis upon the absence of evidence?
Or, if you can use P(H | E) = P(E | H)*P(H) / P(E) Can you formulate it as P(H | ~E) = P(~E | H) * P(H) / P(~E) for absence of evidence?
Indeed. To put it another way, "absence of evidence" is just a different kind of evidence. If hearing a dog bark would tell you something then not hearing it bark also tells you something.
Yes.