of course there are weak chins in boxing. NO ONE DENYS THAT some people cant take a punch. but it is relevent to power, speed and stamina. i dont doubt floyd pattersons knockdowns where due to being hit by a punch that would of ko'd anybody. but he was hard to get rid of. and besides why do you care so much.:think
Can't for the life of me work out the fascination. Shock horror...humans are different and react to punches differently. It's like jizzing in your pants over some defenders being easier to pass than others.