Self-fulfilling beliefs are, in at least some cases, a kind of belief that is rational to form and hold in the absence of evidence. The rationality of such beliefs have significant implications for a range of debates in epistemology. Most startlingly, it undermines the idea that having sufficient evidence for the truth of p is necessary for it to be rational to believe p. The rationality of self-fulfilling beliefs is here defended against the idea that their rationality is incompatible with (...) a compelling closure principle. (shrink)