I’m firmly in the camp that believes Muhammad Ali legitimately beat Sonny Liston twice. The second fight, in 1965, caused so much consternation because Ali scored his knockout on a so-called “phantom punch” (which was actually an anchor punch). Howard Cosell corralled Jack Dempsey, Rocky Marciano, and journalists Jimmy Cannon and W.C. Heinz to discuss the controversy.
Postscript: Marciano “fought” Ali four years later via computer, right before perishing in a plane crash. In 1968, Heinz co-wrote the novel M*A*S*H under the pseudonym “Richard Hooker.”