Abstract
Peter van Inwagen notes: "... almost all philosophers agree that a necessary condition for holding an agent responsible for an act is believing that the agent could have refrained from performing that act." Perhaps van Inwagen is right; perhaps most philosophers agree on this. If so, this shared assumption, which I will call CDO (for "could have done otherwise"), is a good candidate for denial, especially since there turns out to be so little to be said in support of it, once it is called in question. I will argue that, just like those people who are famous only for being famous, this assumption owes its traditional high regard to nothing more than its traditional high regard. It is almost never questioned. And the tradition itself, I will claim, is initially motivated by little more than inattentive extrapolation from familiar cases. To engage the issue, I assert that it simply does not matter at all to moral responsibility whether the agent in question could have done otherwise in the circumstances.