Artificial limbs in the Olympics

Prosthetic limbs are hardly what I would call a "machine." It amazes me that people think he actually has an advantage because he has fake legs.

ma·chine (m-shen) n.
1. a. A device consisting of fixed and moving parts that modifies mechanical energy and transmits it in a more useful form.
b. A simple device, such as a lever, a pulley, or an inclined plane, that alters the magnitude or direction, or both, of an applied force; a simple machine.