  Four of the argument’s five premises (namely, 6, 8, 9, and 11) are fairly noncontroversial. Premise 1 has been doubted, however. Thomas V. Morris has suggested that, for persons to be distinct, all that is needed is the possibility that their wills differ. Suppose for example, that it is impossible for x to will A and for y to will not-A (and vice versa) but that it is possible for x to will A and for y to neither will A nor will not-A (and vice versa). Their wills could thus differ although they could not conflict.