Board Thread:Naruto Discussions/@comment-25358381-20140903032737/@comment-24531362-20140904035844

It is you who lacks common knowledge, sir. If Amaterasu flames didn't go out when the fuel is gone, the entire world would be burned to cinders from the combined effect of all Amaterasu used in history. This isn't the case, ergo, Amaterasu flames can go out. Going out is not the same as extinguishing. If I pour water onto a fire, I extinguish it. If it goes out on its own, it wasn't extinguished. The implication of Amaterasu is that if you aren't Sasuke, the flames burn until that which they were burning stops existing, then go out because of lack of fuel.