Abstract
aristotle closes the second common book of his ethical treatises by considering a number of puzzles about wisdom and φρόνησις,1 devoting the bulk of his attention to a puzzle about the usefulness of the latter. Briefly, the puzzle is that if φρόνησις is useful insofar as it enables us to act virtuously, it will be useless both to the virtuous person, who naturally acts well without possessing it, and to the non-virtuous person, so long as someone else tells her how to act. Either way, it would seem, possessing φρόνησις is useless. There is agreement among scholars that Aristotle’s reply depends on the following biconditional claim: Virtue-Φρόνησις...