Now, im not just saying muay thai just because of the whole kicking. As i see it, a punch is a punch, a kick is a kick. It depends on if the mt or boxer trained harder at the timing, did more co-ordination, lifted more weights, trained more, etc. But over all, a mt would cream a boxer. I doubt, unless with extra cirricular activity, a boxer would have a hard time dealing with all of mt's knees (especially that one move where they jump off the knee and plant thier knee in the dudes face) and elbows. and with all the lock ups and clinches, a boxer would be helpless but to sit there and defend the entire time. Its a fact, the elbow is one of the hardest things on the human body. Harder (if used correctly) than a fist. All a mt would have to do is just constantly pound on one of the boxers legs untill he couldnt shift his weight on it. I doubt many punches would be thrown then. Unless the boxer has a good general instinct to hook under the leg, take him down, and beat the crap outta him, then he is like....a fish in a thing of pudding versus a grizzly bear.