This paper examines Linda Zagzebski’s account of rationality, as set out in her rich, wide-ranging, and important book, Epistemic Authority: A Theory of Trust, Authority, and Autonomy in Belief. We briefly describe the account that she offers and then consider its plausibility. In particular, in the first section we argue that a number of Zagzebski’s claims with regard to rationality require more support than she offers for them. Moreover, in the second section, we contend that far from offering Zagzebski a (...) quick way of dealing with radical scepticism, her account of rationality actually seems to be particularly vulnerable to this problem. (shrink)