I love that quote because it captures the mentality needed to survive and overcome – anything. Do what you need to do. Does that preclude a “fair fight?” Nope. If you’re in a consensual contest, then rules are in place, whether you understand them completely or not. In Olympic TKD, punching your opponent makes you a loser, since the rules preclude it. In an attack, it’s de rigueur to hit your opponent wherever you need to, and as hard as you need to, with whatever you have to, in order to survive and win.