 The attitudes that reason requires, in any given situation, are formally coherent. Thus, if one has formally incoherent attitudes, it follows that one must be violating some requirement of reason. The problem is not, as the idea of requirements of formal coherence as such suggests, that incoherent attitudes are at odds with each other. It is instead that when attitudes are incoherent, it follows that one of these attitudes is at odds with the reason for it—as it would be even if it were not part of an incoherent set. (Kolodny 2007: 231)