Good afternoon. It is a pleasure to be here with you at your convention. I will try to be as brief as possible, which is what every last speaker should do. By now, you must be really tired. Although I feel your pain, my topic, however, will not ease your pain. From some perspectives, it is one of the most metaphysical subjects human mind has devised. I will try to make it as straightforward as possible. That is what I tried to do in the description of my talk, which is printed on your program. I tried to synthesize what I would say, so that reasonable men and women could decide that the beach, the pool or the casino would be more worthwhile enterprises.