Persons, post-persons and thresholds

DeGrazia argues that post-persons have as much justification in believing that they have higher moral status than persons as persons have in believing that they have higher moral status than animals. DeGrazia's claim presupposes that what Buchanan calls the "moral equality assumption" is false. This article argues that DeGrazia has given us no reason to disbelieve the moral equality assumption. Further, even if DeGrazia's arguments about moral status were sound, it is unclear that his first-order normative claims about how we should weigh human against animal interests would follow.