Here is something written by my Master regarding Tae Kwon Do and what it is: "Tae Kwon-Do is an international martial art 'originating in Korea,' which teaches the scientific use of the body in methods of self-defense." The above quote is reffering to ITF Tae Kwon Do, but I think it's ridiculous to think that any form of martial art that teaches you how to block, kick, punch, etc. would be useless in a situation where you needed to defend yourself.