“The skin cells on your nose might well be “potential human beings,” in the loose sense in which a rubber ball is a “potential eraser.” But a zygote is not a “potential human being” or a “potentially rational animal.” Rather, it is an actual human being and thus an actual rational animal, just one that hasn’t yet fully realized its inherent potentials. Harris and his ilk might want to ignore the importance of this distinction, but that it is a genuine distinction cannot rationally be denied.”
