Thank you, Mr. Smarty Pants.
My undergrad degree is in science, and they didnt let even a dummy like me through without taking and passing some physics. Yes, speed and power related concepts, but they arent the same.
And in fact, you ought to be questioning the original statement, not me. The poster's statement was when it comes to speed - with knife you dont need so much power as in boxing. He didnt say, when it comes to power, it isnt as important as speed in knife fighting. I would have agreed w/him. If thats what he meant, he didnt say it in a way I could understand it; thus my confusion. My confusion was with regard to HOW he related the concepts in what he said, not with how and whether or not power and speed had any relationship in general.
Using LAY terminology and in the particular context of that scene, power means how hard he stabbed and speed means how quickly, which is all they claimed to measure (speed) on the show. Yes, most of us know instinctively, w/o any resort to academic science, that all other things being equal, the more power (lay terms here, not going into various technical terms used to describe different types of forces) you push something with, the faster its gonna go, but as you well know, all things arent usually equal, and there are umpteen other variables, like mass, for one.
If the point of your disagreement with me is to claim that speed was all about power, the stronger a guy is, the faster hed be. The bottom line is that its rare to see a guy that big (and obviously strong, what most of us laymen would equate to power) move that fast. Most of the Worlds Strongest Man competitors usually arent able to move that quickly.