 Among psychologists, some say that motivating and explanatory reasons are mental or psychological facts, rather than mental states. This is because psychologism holds that reasons are mental states such as “an agent’s believing (or wanting, or knowing) something”, and it is easy to move from the claim that someone’s reason is his believing something (a mental state) to the claim that his reason is that he believes something (a psychological fact). For instance, it is easy to move from saying that Joe’s reason for running is his believing that he’s late (a mental state) to saying that Joe’s reason is (the fact) that he believes that he’s late.