Rationality, Reasons, and Criticism
Chapter 2 elucidates why the normative question about rationality is important and why the normativity of rationality is plausible. It presents an argument to the effect that the criticizability of irrationality entails the normativity of rationality (2.1). It goes on to explain and support the main premise of this argument, namely that a person is criticizable only if she violates a decisive reason (2.2). This premise is defended against three possible alternative conceptions of criticism, which hold that criticizability can be grounded in the violation of a subjective ‘ought’ (2.3), in malfunctioning (2.4), or in acting in a less than virtuous way (2.5). The other premise of the argument, that irrationality is criticizable, is subsequently discussed. The main conclusion is that those sceptical about the normativity of rationality are committed to a highly revisionary error theory about ordinary attributions of rationality and irrationality (2.6).