This isn't about sarcastic comments like say, "I've learnt Marciano can beat any heavyweight ever" or bickering or any other such stuff. Genuine learnings and it need not be something carved in stone. I'll kick off with Roberto Duran. When i came here i had a pretty big knowledge of my own era which would be late 70's to mid 80's say. I was quite a bit behind on Duran however. His big lightweight run was a bit prior to me and all i could take in was that he won 1 fight out of 6 against SRL, Benitez, Hearns and Hagler. In the early 80's fighters weren't fighting no stop like they did in prior decades and losses had a fair sized stigma about them and were considered very big set backs in most cases. I'd see Duran rated above these guys and I had very little grasp of the context of it all. slowly thigns came into place, the guy was making lightweight for a decade, he'd had 72 fights before he'd even fought SRL, he was 135 champ for half a decade and possibly the greatest fighter ever to grace the division etc etc etc. Eventually his achievements came into focus more clearly. On a related matter I would see all the L's on records like Archie Moore and Ezzard Charles and think jeez these guys can't be much chop. Eventually i realized the L's were a product of their era and circumstance. They were fighting all the time, top guys were fighting each other in a consistent basis, losses weren't viewed quite the same as my era etc etc.