Clearly, I believe in this interdisciplinary exercise, and I accept the enlightenment that intelligent outsiders can bring to the puzzles of a discipline. The differences in approach are so fascinating—and each valid in its own realm. Philosophers will dissect the logic of an argument, an exercise devoid of empirical content, well past the point of glaze over scientific eyes (and here I blame scientists for their parochiality, for all the world’s empirics cannot save an argument falsely formulated). Lawyers face a still different problem that makes their enterprise even more divergent from science—and for two major reasons.