 Despite its advantages, even this modified version has problems. First, whether one belongs to a given species depends on biological criteria, such as whom one can mate with, whom one is born of, or having the relevant DNA. But it is unclear why these biological criteria are relevant for moral status. The point can be sharpened this way. The human species, for example, is a morally relevant category because the species is characterized, in part, by morally relevant properties such as sophisticated intellectual and emotional capacities, and not merely by biological criteria (e.g., mating abilities). But it is unclear why a token member of a species, a token lacking any of these morally relevant capacities, should get the moral status from the type it belongs to (the species). If membership in the type does not require any of the morally relevant features, how can the membership be morally relevant? Consequently, this modified account has its own problem of arbitrariness (Feinberg 1980, p. 193; Sumner 1981, pp. 97–101; and McMahan 2002, pp. 212–214, 216). McMahan provides an especially interesting imaginary example involving cognitively enhanced Superchimps, which, on the account under consideration, generates counterintuitive consequences for the moral status of the unenhanced chimps. For example, if the Superchimps came to outnumber ordinary unenhanced chimps, the norm for the chimp species would have changed and for this reason alone the unenhanced chimps would have gained higher moral status. A related counterintuitive consequence, not mentioned by McMahan, is the following: if the Superchimps become their own species (via gene therapy and interbreeding), a cognitively impaired member of this newly created Superchimp species with the same cognitive capacities as a non-impaired ordinary chimp (assumed here not to be sufficiently cognitively sophisticated to have FMS) would have a very different moral status from the ordinary chimp. And yet the two chimps would be alike in every respect other than their species classification.