How do we know floyd or pac dont get robbed if they fight?

Ok, first off I will say that I always have thought pac is overrated and floyd beat him if they fought. I think marquez won yesterday and "got robbed" if you want to call it that. Thats is not the point of this thread though. What if we get the "mega fight" we have all been waiting for and then either pac or floyd are robbed by the judges and the person who actually won does not get the decision? When you have a judge scoring it 116-112 pacman yesterday there is something wrong and obviously that can happen in any fight if you have judges being able to do what they want.