“WHEN ASKED “ What do we need to learn this for?” any high-school teacher can confidently answer that, regardless of the subject, the knowledge will come in handy once the student hits middle age and starts working crossword puzzles in order to stave off the terrible loneliness. Because it’s true. Latin, geography, the gods of ancient Greece and Rome: unless you know these things, you’ll be limited to doing the puzzles in People magazine, where the clues read “Movie title, Gone ____ the Wind” and “It holds up your pants.” It’s not such a terrible place to start, but the joy of accomplishment wears off fairly quickly.”