I'm sorry do you have a crystal ball or something? How do you know for a 100% certainty that he would have been stopped? What do you mean? Untrue. Freak injuries have nothing to do with how easy (or not) you are to KO. But Liston wasn't down for the count nor even floored against Ali. He was stopped because of a freak shoulder injury as attested to by 8 doctors. He also had a shoulder injury going into the bout and asked for a postponement and was denied. All of this is recorded.