User blog comment:Yatanogarasu/Sabo: Dead or Alive?/@comment-1595565-20100614011033

If Sabo was confirmed dead by other protagonists and then suddenly comes back in the present, it would be the same as Olvia, Tom, or Saul making a reappearance in the next chapter. Oda doesn't raise the dead, except on Thriller Bark. The reason why people aren't asking the same questions about Ace or Whitebeard is because they were confirmed dead in the story. Ace confirmed his own death by stating it, and the narration confirmed Whitebeard's. Dogura stating it and Luffy and Ace accepting it is basically the same thing.