 Imagine you are a cycling fan and are watching Lance Armstrong decimate his rivals in the time trial up L'Alpe d'Huez. However, before the event ends you are called away from the TV. You quickly put a videotape in and press record. You get time to watch the video the next morning and have successfully avoided finding out the result. Are you as excited about watching the video as you were when you sat down to watch the event on TV? I suggest not. I think this example highlights an interesting top