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How to Be a Bayesian
Bayes' theorem says that you have a prior credence or probability that you're giving to various propositions and then it tells you how to update your credences when new evidence comes in. The idea of Bayesian epistemology is that that's how knowledge works. We start with a whole bunch of credences for different propositions, then we update them when we get new information coming in. If only we actually did that, that would be great.