Don't take things too literally. 'Fearing for his health' was a little topspin. But i believe it would be a mismatch. Floyd has virtually no chance with a prime Robinson. Oh, btw. I'm actaully a big fan of Floyd's so don't jump to conclusion.
I typed up a big response, my computer tweaked, I don't want to re-type it. Essentially: my apologies.
Hopkins-Hagler would be competitive, with Hagler likely prevailing in my opinion. Archie-Moore would be a bizarre sight to see. It'd be similar to Jim Carey beating himself up in the bathroom in Liar Liar. You can't get a winner there because Archie Moore would just be inflicting punishment on himself.