Board Thread:Theories and Speculation/@comment-27924662-20160817160245/@comment-25122992-20160826193756

I still can't undertang what's the problem in this argument. We should just rely on the statements which were explicitly stated in the manga/databooks/other official sourses. So:
 * Black Zetsu saw Sasuke's Susanoo blocking the light of IT and stated that the Rinnegan allows him to repell the genjutsu. No more, no less. It means that Rinnegan itself is immune to IT, Susanoo just can exteng the range of immunity to cover the other people. What Sasuke did was only enhance the Susanoo with his Rinnegan ability, a principle similar to Sasuke using Chidori through Susanoo which doesn't cancel out Sasuke's capability to easily use Chidori without it, but he was in need to extend its usual power through another jutsu.
 * Secondly, Sasuke warned Naruto not to leave his Susanoo since he'd be already affected by IT outside of it. Sasuke knew Naruto possessed the SPC and several advanced abilities like Tailed Beasts' powers and TSBs, yet he still said Naruto would be got in IT anyway. It means that only visual prowess of the same calibre (i.e. the Rinnegan) can counter IT, and any other Six Paths powers wouldn't be enough.