Published online by Cambridge University Press: 09 March 2021
This essay provides a novel argument for impurism, the view that certain non-truth-relevant factors can make a difference to a belief's epistemic standing. I argue that purists, unlike impurists, are forced to claim that certain ‘high-stakes’ cases rationally require agents to be akratic. Akrasia is one of the paradigmatic forms of irrationality. So purists, in virtue of calling akrasia rationally mandatory in a range of cases with no obvious precedent, take on a serious theoretical cost. By focusing on akrasia, and on the nature of the normative judgments involved therein, impurists gain a powerful new way to frame a core challenge for purism. They also gain insight about the way in which impurism is true: my argument motivates the claim that there is moral encroachment in epistemology.
For helpful discussion, I am grateful to Mike Ashfield, Ethan Brauer, Patrick Croskery, Justin D'Arms, Jenni Ernst, Brian McLean, Julia Jorati, Matthew Shields, Keshav Singh, several anonymous referees, and audiences at meetings of the Eastern APA and the Ohio Philosophical Association. Special thanks to Tristram McPherson and Declan Smithies, who provided invaluable help at every stage of the drafting process.