Board Thread:Versus Debates/@comment-36394790-20180824122210/@comment-9782468-20180830212515

@Combat, gravity's speed was previously measured and confirmed. Itachi's own words on the Susanoo's requirements were debunked (Susanoo being awakened by those who awakened Amaterasu and Tsukuyomi).

We can't assume someone has something unless they use it. Otherwise, we could say things like Kakashi has Izanagi and Izanami. The only prerequisites to those techs are the Sharingan. But do we consider Kakashi a user of those techs? Of course not.