Who determines who is in their prime?

[ykdadamaja]

We keep talking about a "prime" fighter fighting another fighter in his prime, but who determines "prime"...??

Some folks say Hopkins was well past his prime when he fought Jones for the second time. No, Jones was past his prime- Hopkins was right in the middle of his if we want to be honest.

Antonio Tarver's prime came when he was in his mid-30s when he beat Jones.

And I would venture to say the 90s Foreman that beat Moorer was a better and more complete fighter than the 70s Foreman that fought Ali.

And as it appears now, as he got some rest, Nonito Donaire is having a resurgence and is about to hit another gear in his career- He looks better than ever!

So who determines prime?