I once regularly performed a party trick for my students. After they sent me a one-page assignment, I would tell them what they regularly read. “You read The Economist and The Wall Street Journal compulsively, cover to cover, every day,” I told a commercial banker, who was astonished, like I’d just accurately guessed his maternal grandmother’s maiden name. “The last time you read a book was in tenth grade,” I told a student finishing an MS in Entrepreneurship, who did a double-take before he confessed, “How’d you know?”