1. The Doyle-Robinson fight is debatable, as it was late in the fight and there is no real way of knowing, as there is no tape as far as I know. Also, according to wikipedia, Doyle had been taken to the hospital for head injuries prior to the Robinson fight, which makes me suspect that there could have been a congenital problem. http://en.wikipedia.org/wiki/Jimmy_Doyle_(boxer) 2. That's a hypothetical, not an example. Could a Peter punch hurt Roy? Sure. But it never happened so it's impossible to say.