 A more satisfying reply would have us adopt what might be called a multi-factor perspective, one that takes into account the kinds of interest that are possible for certain kinds of morally considerable beings, the content of interests of the beings in question, their relative weight, and the context of those who have them. Consider a seal who has spent his life freely roaming the oceans and ice flats and who is suddenly and painlessly killed to provide food for a human family struggling to survive a bitter winter in far northern climes. While it is probably true that the seal had an immediate interest in avoiding suffering, it is less clear that the seal has a future directed interest in continued existence. If the seal lacks this future directed interest, then painlessly killing him does not violate this interest. The same cannot be said for the human explorer who finds himself face to face with a hungry Inuit family. Persons generally have interests in continued existence, interests that, arguably, non-persons do not have. So one factor that can be appealed to is that non-persons may not have the range of interests that persons do.