“All zoogles are boogles. You saw a boogle. Is it a zoogle? Adolescents who make a mistake answering this kind of question on their SAT may not make it to college. But those who get very high scores can still feel a chill of fear when someone from the wrong side of town steps into the elevator.

Many people confuse the statement “almost all terrorists are Moslems” with “almost all Moslems are terrorists”. Such confusion partakes of a trivial, very trivial, logical error. Not even professors are particularly immune to such errors. Complicated equations do not tend to cohabit happily with clarity of mind.