Actually all you proved was that you didn't read the manga correctly... Sasuke knew it was all a genjutsu, after Itachi first shown it was a genjutsu, Sasuke showed that he was using genjutsu
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Then after he showed it was another genjutsu, Sasuke showed to already know and said he sees through it
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. Sasuke was just getting information out of Itachi. Even Zetsu said they haven't moved an inch because they were both fighting with purely genjutsu
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. What sensor have Itachi ever used a genjutsu on? He had to use Izanami, an asspulled jutsu that is suppose to be the pair for Izanagi yet doesn't require Senju, on Kabuto.
That didn't really prove anything but sharingan vs sharingan of two skilled Uchihas makes genjutsu useless. Yeah and Naruto was going to suppress Kurama's chakra himself, for all you know Naruto allowed Sasuke to do it
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You can't confirm that Sasuke can suppress it if Naruto wanted to use the power since Sasuke couldn't suppress the 8 tails from Bee. Speed>Sharingan What happens when the sharingan tries to read a faster opponent? Ask Sasuke
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and
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. Not even the sharingan can keep up with A, Minato is faster than A
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.