If this conjecture regarding the intimate or internal relationship between virtue and moral sense is correct, then it does much to explain and account for the range of exemptions that are required in this area. Hume’s understanding of the operation of moral sentiment is not simply a matter of enjoying pleasant and painful feelings of a peculiar kind (T 3.1.2.4/472). On the contrary, the moral evaluation of character involves the activity of both reason and sentiment. The sort of intellectual activities required include not only learning from experience the specific pleasant and painful tendencies of certain kinds of character and conduct, as well as the ability to distinguish accurately among them, but also the ability to evaluate character and conduct from “some steady and general point of view” (T 3.3..15/581–2; EM 5.41–2/227–8). Clearly, then, insofar as the cultivation and stability of virtue depends on moral sense, it also requires the intellectual qualities and capacities involved in the exercise of moral sense. (One way of understanding this is to say that moral sense and moral reflection serve as the counterparts to practical wisdom or phronesis in Aristotle’s moral theory. See Russell, 2006.) Given this, an animal, an infant, or an insane person will lack the ability to perform the intellectual tasks involved in the production of moral sentiment. We cannot, therefore, expect virtues that are dependent on these abilities and intellectual activities to be manifest in individuals who lack them, or when they are damaged or underdeveloped.