I think it would have been a ko for Frazier in round 12 had they fought in 68-69. BECAUSE.....Ali would've been dancing WAY MORE than his flat footed 1971 style and therefore would've tired out faster and Joe would've caught him in 12. As Ali would've gassed out running from Joe's wicked unstoppable onslaught. It wouldn't have occurred to Ali in 68 to stand flatfooted and punch with Frazier.