Board Thread:Theories and Speculation/@comment-31338621-20180506051005/@comment-734582-20180506074012

BrainBrand wrote: Kakashi implied that Tsukuyomi can't be defeated. Itachi even praised Kakashi for his analysis, when he said that. Kakashi couldn't defeat it, true. Sasuke did.

Plus, did you forget that all the Amaterasu that itachi spammed was still there, same for the damage done by Kirin and whatnot? It wasn't a genjutsu.