... There is an old joke besed on this. A mathematics professor places a male student at one side of an empty room and a gorgeous female student at the opposite wall. On command, the boy walks half the distance toward the girl, waits a second, then goes half the rest of the way, and so on, always pausing a second before he cuts the remaining distance in half. The girl says, "Ha ha, you'll never reach me!" The boy replies, "True, but I can get close enough for all pratical purposes."