16 (2):175-185 (2019
Can we make mistakes about what rationality requires? A natural answer is that
we can, since it is a platitude that rational belief does not require truth; it is possible
for a belief to be rational and mistaken, and this holds for any subject matter
at all. However, the platitude causes trouble when applied to rationality itself. The
possibility of rational mistakes about what rationality requires generates a puzzle.
When combined with two further plausible claims – the enkratic principle, and the
claim that rational requirements apply universally – we get the result that rationality
generates inconsistent requirements. One popular and attractive solution to
the puzzle denies that it is possible to make rational mistakes about what rationality
requires. I show why (contra Titelbaum (2015b), and Littlejohn (2015))
this solution is doomed to fail.