 Philosophical distinctions do not follow this logic because they do not presuppose that the concepts the philosopher disambiguates capture a specific set or class. The task of philosophical analysis precisely is to distinguish concepts which coincide in their instances. When two philosophical concepts coincide in their instances the thing which exemplifies them is not a hybrid, as amphibians or the platypus are. It is one thing seen from different perspective or brought under different descriptions. So, for example, a song exemplifies the concepts of music and poetry, but to say this is not the same as saying that it is part music and part poetry in the way in which a centaur is part man and part horse or the platypus is part mammal and part oviparous. Aesthetic distinctions between poetry and music, like moral ones, are distinctions which bring the whole of the object, not a part of it, under a different description. Philosophical distinctions are purely intensional distinctions between distinct concepts or genera. But they are not for this reason inconsequential. Just as those who fail to disambiguate the concept of love from that of jealousy will be not be able to comprehend how a loving partner need not be jealous so those who fail to disambiguate the concept of the good will not be able to comprehend how the pursuit of what is morally right may not be in one’s self-interest.