Bill and Marie began the day filled with excited anticipation. It was the first day of their vacation, and they were headed by car to the beach house they had rented for the week. After a couple of hours on the road, Marie asked, “Are you sure we are going the right way?” “Of course we are,” said Bill. An hour later, with a little more concern in her voice, Marie asked again, “Are you sure this is the right way?” “Yes, I’m sure we’re on course” came the reply. After another hour, Marie was really worried, “Honey, are you sure we’re going the right way? I don’t see any signs for the beach.” After a moment, Bill answered, “I’m not so sure now, but at least we’re making good time!”