I think Hock does a good job of dispelling what can and cannot absolutely happen. Like he says, knife assailants just might be really dumb, uncoordinated, fat, weak, drunk, etc., because, who in their right mind would start such a fight without having some problems to begin with?
I think in a 'fair knife duel' it's probably a given that you're going to get cut, but we know they don't really exist. Well, they don't exist in any lawful setting anyway. If you find yourself in a knife duel, it's probably your fault in the first place.
I study/teach a traditional Korean sword martial art, Gumdo (pretty close to Kenjutsu), and we say that there are really only 2 outcomes to a sword duel: 1 person hur and, the other dead or both dead. Again, maybe this isn't 100% the case, but it gives a mindset. More importantly though, it's safe to say that simply because sword duels don't exist anymore. If you find yourself in a sword duel, you probably deserve to die just for thinking that you live in 15 century Japan.