  But does everyone always do what he thinks he ought to, when he is physically and psychologically able? It may seem that this is  simply not always the case (even if it is usually the case). Have you, dear reader, never failed to get up off the couch  and turn off the TV when you judged it was really time to start  grading those papers? Have you never had one or two more  drinks than you thought best on balance? Have you never  deliberately pursued a sexual liaison which you viewed as an overall  bad idea? In short, have you never acted in a way which  departed from your overall evaluation of your options? If so, let me  be the first to congratulate you on your fortitude. While weak-willed action does seem somehow puzzling, or defective in some important  way, it does nonetheless seem to happen.