My opinion is that Nate new that he was a better puncher and probably he only poossibility was to da what he did take the risk of stepping firmly and exchange with Diaz. If he started to move probably Diaz could win a one sided decision putting pressure thru the fight. If he used any steroid or not, I don't know, but I wish we define who is the champion in the ring. If there are questions then, I believe Diaz should fight for the rematch and try to take revange on the ring or take other beat up. Even if he win a demand and get his title back (which I am not sure will happen) he still will have that shadow over him. Specially when Diaz team are claiming that the big eye cut was caused by headbutts, but the replays show a clear punch.