Abstract
What is the relation between knowledge and action? According to one standard picture,
there is none. Rational action is a matter of maximizing expected utility, where expected
utility is a function of utility and subjective credence. It is subjective degrees of belief
that matter for rational action, not knowledge. On this picture, having knowledge that p is
independent of whether it is rational to act on one’s belief that p: knowledge that p is not
sufficient since one may know that p despite lacking sufficiently high subjective credence
to warrant acting on the proposition that p; and knowledge that p is not necessary, since
high subjective credence can rationalize action even in the absence of knowledge.
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