Suppose a certain person in fact did not go to Boston this morning, but suppose it seems that he could have done so. We want to say that though he stayed in Providence, he could have done otherwise — he could have gone to Boston. Surely the statement that he could have done otherwise does not mean merely that it is logically possible that he did otherwise, for superhuman and miraculous bits of behavior are logically possible. But we don’t want to say, of a person who failed to perform a miracle, that he could have done otherwise. Nor does our statement mean that it is epistemically possible that the person did otherwise. Suppose that this man was confined in Providence, and utterly incapable of getting to Boston on a certain morning. Suppose we know nothing about this confinement. We just know that he remained in Providence. Under these circumstances, while it is epistemically possible for us that he went to Boston, it would not be correct to say that he could have done so. His doing otherwise than staying in Providence was epistemically possible for us, but not possible for him in the way that bears on moral responsibility.