 While 5.3 accounts and the equal moral consideration approach may seem to imply treating human beings and most animals alike, many of the defenders deny this counterintuitive implication by showing that two beings can have equal moral status (or deserve equal consideration) and yet require differential treatment due to differences in the interests impacted. What an unimpaired adult human stands to lose in being killed, for example, is much weightier than what a bird would lose. The capacity of foresight, for example, can make for weightier interests, and so human beings with this or other forms of cognitive sophistication are harmed more by death (Rachels 1990, pp.186–194; Regan 2004, pp. 304 and 324; and DeGrazia 1996). Potentiality can also explain differential treatment of two beings based on interests impacted, while maintaining the beings’ equal moral status. For example, there is a stronger reason not to harm a baby as opposed to a cat, given the potential of the baby and not the cat for a cognitively sophisticated future (Harman 2003, p. 187, although this is not explicitly an equal consideration view). Admittedly, in some cases comparative judgments of whose interests are morally weightier, and hence judgments about differential treatment, can be difficult, in part due to the difficulties in knowing the capabilities of minds very different from ours and of comparing well-being across species (DeGrazia 1996).