  In any case, Aristotle’s discussion of nutrition is characteristic of his general approach to the soul’s faculties. His discussions often proceed on two levels. On the one hand, he simply seeks to provide an account of the relevant phenomena. At the same time, his interests in definition are conditioned by a host of broader methodological and metaphysical concerns. Consequently, he attempts to capture the nature of the individual faculties while at the same time investigating whether reductive accounts of them are plausible. In this way, at least, Aristotle’s investigations reflect sensitivity to an array of interlocking questions in definitional methodology, including most notably questions about the plausibility of reductive approaches to life’s most characteristic features. These same interests are apparent in his discussions of perception and mind.