It's a Sherdog classic: "x fighter was past his prime so he lost." Which is of course always followed by "No, his competition just got better stop making excuses". If you say a fighter doesn't look as amazing as before, or looked bad in a fight it often results in people saying you are discrediting their opponent etc. But if primes do exist doesn't that mean that this is a valid thing to say at least sometimes? Some popular examples of the top of the dome being being Shogun, Fedor, Crocop but there are many many more of course. So I ask you Sherdog, do primes exist or are they just a way to make excuses? Edit: Since the overwhelming answer is yes, when is it acceptable to say and not considered excuse making?