User blog comment:12th Supernova/Chapter 794: Memory/@comment-1991783-20150715111704/@comment-1940096-20150717193723

Yet you don't get what canon means yet again. Let's say somehow Bellemere survived and she suddenly appears in the next arc. That would mean she never died and her being alive is canon. Sabo being alive was always canon since he wouldn't be in Dressrosa right now if he was dead. An even better example would be Pell. Everybody thought he was dead but he never died. Some people thought Doflamingo made Sarquiss kill Bellamy too. It is canon that both characters are alive. Also Kaido it never actually said that. It said it from Luffy's perspective and wasn't a statement from Oda. So the databook was wrong to be used as a source to say Sabo was dead.