 Now, notice what one’s reasons for action will turn out to be, formally. Once again, because reasons for action are picked out as what would explain one’s actions, we cannot, on pain of circularity, gloss what it is to be a satisfactory explanation of an action as being a practical reason (cf. Velleman 2009, 40). So we will instead rely on an already available notion of explanation and, Velleman concludes, it must be theoretical, i.e., logically the same sort of explanation that would account for any matter of fact. Returning to the default schema for an illustration, desires are reasons because they (potentially) explain action, and they explain action in the first place because they causally explain it. 