Humanity, that dialectical animal, likes to look at things as binary opposites: raw and cooked, gay and straight, Laurel and Hardy. Just so, foolishness is the usual antithesis of wisdom. But foolishness, as Erasmus reminds us, is one of those qualities with a bit of range to it, so that another possible opposite is prudence. In fact, prudence and wisdom are practically roommates, and while sometimes being wise can look attractive — Gandalf, anyone? — almost nobody, except perhaps investment counselors, really wants to be thought of as prudent. Might just as well be an old maid in sensible black shoes or a Mr. Peepers with a coin purse. No, no, no; give me stiletto heels or give me death! If you can’t say “keep the change,” why bother to go to the bar?