Weak chin = weak legs

there are many variables to why boxers get knocked out, cant just be put down to weak legs and weak chin where the punch lands, how it lands, the position of the boxer, conditioning of the boxer, so many variables...

I agree. Muscular and strong legs WITH strong beck and shoulders normally help a guy take a punch well. The recovery from the punch then comes down to conditioning.

It has nothing to do with your legs, wether its huge or thin, obviously, if you lost consciousness, you will fall like a sack of potatoes.

I would think a thicker neck would help more than legs. It is like shocks where it can absorb a lot of the impact.

Leg size alone doesn't mean sh*t If anything, if someone has big legs he probably has big neck too, which could be a more reasonable factor in having a more resillient chin. You can test your hypothesis, but a sample of two is not sufficient. Try 10-20 at least.

You might be right, Khan has tiny legs

Not true at all. I've seen guys with tree trunk legs get rocked silly in the gym and skinny stick insects walk through big shots like it's nothing. God knows what the main factors in having a strong chin are but having strong legs is not it. Maybe they help with the recovery or something else after taking a big shot but in regards to actually being able to hold a shot or not IMO legs have nothing to do with it.