G
GwemBaba
Guest
Lets not go down that trail of logic. It never leads anywhere good. I can infer that that any shinobi can use any technique simply because it hasnt been confirmed..? Im sure you see the flaws in that. Anyways, the grand fireball technique in the Uchiha clan was something like a rite of passage in the clan. It was a signature Uchiha move. Kakashi himself said most shinobi have up to two nature types mastered and he is currently standing at three canonically as it is. He does not have katon, and i say that with 100 percent confidence
Im only stating that it's possible due to the Sharingan he posseses, there's still time for either of us to be right or wrong, so I'd suggest we end it here.
Last thing I'll say is that surely, even though it was demonstrated in the anime, that it should be given at least some form of credibility.