Board Thread:Theories and Speculation/@comment-1512913-20150221101637

What we do know and what we don't... I can't make much sense of it all, but some things are strange:
 * The Ten-Tails' jinchuuriki need two Rinnegan eyes for Rinne Sharingan, Obito only had one, hence why he used the split tree tactics for Infinite Tsukuyomi instead.
 * Yet Kaguya herself has Rinne Sharingan without the Rinnegan.
 * The Infinite Tsukuyomi is a Sharingan/Rinne Sharingan Genjutsu.
 * Yet it was also stated to be a Rinnegan Genjutsu.
 * Yet Rinnegan is reflected in the affected eyes.
 * Yet Rinnegan users are immune and can cancel it.
 * Sasuke has a single eye with Rinnegan circles and color, but also with six tomoe, it's called Rinnegan, despite having more resemblance to the Rinne Sharingan.
 * Despite being a Rinnegan, it can use all Sharingan powers, even those of the Mangekyou.

The relationship between the Sharingan and the Rinnegan was blurry at best back in the day, now with Rinne Sharingan and Sasuke's "Sha-Rinnegan" in the mix, I can't see through it at all. But I'm gonna try to make up some explanations and excuses for these:


 * 1) Perhaps Kaguya indeed does have the Rinnegan as well and can switch between it and the Byakugan. She may also have the Tenseigan for all we know and the only reason she didn't use Rinnegan and Tenseigan is because of plot restriction. Farfetched? Well, not really. It's one of the most common cliches in fiction, the villain has power and a chance to kill the good guys but he or she doesn't do so, because happy ending hurray, screw logic.
 * 2) If the Rinne Sharingan is a mix of both the Rinnegan and Sharingan or rather the original form, then calling Infinite Tsukuyomi both Sharingan and Rinnegan Genjutsu would be only a matter of semantics. Still fishy though that the ordinary Rinnegan has no Genjutsu powers, yet those trapped in Infinite Tsukuyomi have it reflected in their eyes and without any Sharingan tomoe.
 * 3) Sasuke has just one Rinnegan with Sharingan powers, resembling purplish-grey Rinne Sharingan with one set of tomoe missing. It is possible that Sasuke has the power of two Rinnegan eyes in one eye socket, meaning it matches Hagoromo and Madara's two. He also has a power of one Sharingan mixed into it, so his eye consists of power of two Rinnegans but just one Sharingan, explaining why it's purplish-grey and called Rinnegan rather than Rinne Sharingan, since it lacks power of another Sharingan. So my hypothesis is that if Sasuke were somehow able to channel power of his right Sharingan into his left Rinnegan, it would evolve into the Rinne Sharingan, meaning that it's in intermediate state, close to the Rinne Sharingan but not enough.

Hope you like this and feel free to come up with your own stuff. 