Never a good idea to atempt a rational discussion with delutional people, but how can anyone claim to be a Wanderlei fan and call Leben a can? They basically have the same style. It's an aggressive style that involves taking huge risks in going for the knockout, and sadly Wanderlei doesn't have the chin to support that style anymore.
Also, the examples given by some to explain how "better" fighters can lose to "cans" and still be superior fighters carry a logic I've only encountered in people suffering from delutions. A fight between two people is to determine who is the better fighter, and a knockout is a pretty clear statement to that fact. It's not about who look the best hitting pads or a punching bag. It's not about being a Karate world champion at performing perfect techniques against imagined opponents. And regarding stamina, you can't say a person is a better fighter but he can't win because he doesn't have a gas tank. It's not just about technique, you need stamina to fight. It's like if somebody made a car and said "hey, this is the fastest car ever made. It has the fastest engine, best wheels, all aerodynamic and hightech and shit. Only, we didn't have room for a gas tank, so you can't actually drive it. But it looks really fast." Im sure it would be a cool car to look at, but it would lose a race against a Lada from 1960.