David has a B.A. in Linguistics and Music from Swarthmore College, and a Ph. D. in Philosophy from Columbia University. He has taught and tutored students from 6th grade through college undergraduates, in subjects from Latin and writing to several kinds of math and formal symbolic logic, as well as several standardized tests including the SAT and ACT. He is a devotee of electronic music and is the proud owner of an analog modular synthesizer the size of a refrigerator.