The probability of beating someone in a fight is equal to 0.5, ±(The difference in height between you and your opponent)*0.1, regardless of physical ability.
In layman's terms, if you are taller than someone, you can beat them in a fight. A fact known by all tall men, and a fact discredited by all short men.
Well my 5'11" friend, since I am 6'3", I could definitely kick your ass... That's The Branard Theory for ya!