  This might make one try the second answer. We can apply the ‘overlap’ answer to the Jones body, but the question of whether the minds or subjects would have been the same, has no clear sense. It is difficult to see why it does not. Suppose Jones found out that he had originally been one of twins, in the sense that the zygote from which he developed had divided, but that the other half had died soon afterwards. He can entertain the thought that if it had been his half that had died, he would never have existed as a conscious being, though someone would whose life, both inner and outer, might have been very similar to his. He might feel rather guiltily grateful that it was the other half that died. It would be strange to think that Jones is wrong to think that there is a matter of fact about this. And how is one to ‘manage’ the transition from the case where there is a matter of fact to the case where there is not?