[Blarg]

I think that's understimating a punch's ability to do all kinds of things to you without knocking you out, such as stop your momentum, mess up your timing, make your coordination go screwy, make you lose your legs for a moment or two, make you confused or dizzy, or simply slow you down. It can also do something disastrous: set you up for a follow-up punch.

There are many different types of boxers. One who plods straight ahead, doesn't have good footwork or balance, and only punches from limited angles and with primarily one hand -- say Pacquiao as of last year -- would be much easier to take down than, say, an Ali or Mayweather, who can hit from all angles and are very mobile. And anyone facing the reflexes of prime Roy Jones is going to be heavily outclassed in a prime fighting attribute, and may well find himself not able to get away with near what he could with someone, even a champion, with lesser reflexes.