Abstract: The epistemology of medical practice is investigated and the notion of a skill is found to be central to learning about health. This is followed by a discussion of skills, based on the Greek understanding of a skill, as well as the Greek understanding of moral virtue as a skill. Virtue theory, deontology, and consequentialism are articulated by the structure of the epistemology. The argument from disagreement against moral realism is discussed and refuted. Finally, Aristotle's arguments against virtues as skills receive an extended discussion, and responses to them are given.

Keywords: argument from disagreement, Aristotle, consequentialism, deontology, medicine, moral epistemology, skills, virtue theory,