We must put this point about the irrationality of incontinence with some care, however. For recall that an incontinent action must itself be intentional, that is, done for a reason. The weak-willed agent, then, has a reason for doing b, and does b for that reason. What he lacks—and lacks by his own lights—is a sufficient reason to do b, given all the considerations that he takes to favor a. As Davidson puts it, if we ask “what is the agent’s reason for doing [b] when he believes it would b