A combat sports person must keep themselves within the rules of the game in order to win. Look what happened to Tyson after he bit off his opponent's ear.
Ted, you missed my point. Of course one must follow the rules of the game during
the game. In the same way an aikidoist must follow the conventions of training during
training. It's equally silly to presume an aikidoist will follow the conventions of training (bowing, changing roles, etc...) in a self-defense situation.... just as it's silly to presume a combat sports person to do likewise.