The only discussion is over why we never do this.
Top LW: Rotten Rob should've beaten Gray Maynard. Gray beat Frankie Edgar, who beat Spencer Fisher, who beat Thiago Alves, who beat matt Hughes, who beat the LW champion: BJ Penn.
Top WW: Rotten Rob beat Keita Nakamura at LW. Keita beat Yoshiyuki Yoshida. Yoshida beat Akira Kikuchi. Kikuchi beat top 10 WW Jake Shields.
Top MW: Continuing Jake Shields, who beat Yushin Okami, who holds a win over the MW champion: Anderson Silva.
Rob "St. Leg-Kicker" Emerson is the greatest fighter nobody wants to fight.
With this six degrees of separation bullsh*t I can explain why Pete Sell is the best middleweight in the world. After all, Sell beat Phil Baroni, who beat Ryo Chonan, who beat Anderson Silva.
Oh, and I can explain why James Irvin is better than Forrest Griffin, since James beat Houston Alexander who beat Keith Jardine who beat Forrest Griffin. Though, interestingly enough, James lost to two guys that Forrest beat out on TUF (and got a NC with Southworth).
Obviously, you're not serious, but it's fun to do.
Especially if you want to prove that Justin Eilers is better than Fedor. Eilers beat Mike Kyle, who beat Tsuyoshi Kohsaka, who beat Fedor.