A mathematic and an engineer sit at one end of a football field. A wonderful, sexy, provocant woman is sitting at the other end. They can try to reach this gorgeous creature, BUT they should advance in step, each step being half the distance between them and the celestial creature. The mathematic gives up,immediatly: “As you may know, in virtue of the paradox of Achilles and the turtle, we will not ever be able to reach this marvelous woman”. The engineer accepts, very happily… at the end, he only needs a good approximation.