Board Thread:Theories and Speculation/@comment-1512913-20161101211526/@comment-1512913-20161103105245

What you propose I get is that Rinne Sharingan is not partially a Rinnegan but rather an evolution of Mangekyou Sharingan? I disagree. From the way I see it, Rinne Sharingan, the original eye, has powers of both the Rinnegan and Sharingan. Sharingan or rather Mangekyou Sharingan and Rinnegan are merely two halves of Rinne Sharingan.

I suspect that Indra (and presumably Hagoromo) already had Mangekyou Sharingan from the get-go. So what for Uchiha is a 'Mangekyou Sharingan' would basically be just a full power Sharingan and in Indra's descendants this full power Sharingan 'Mangekyou' degraded just into the ordinary Sharingan.

So what I suspect Rinne Sharingan is, is 'Mangekyou' Sharingan and Rinnegan combined, the original form and then it just got split into two different branches of doujutsu.

So today, Sharingan/Mangekyou Sharingan and Rinnegan are 2 separate doujutsu, as demonstrated by Madara, who could use only 1 of those at a time, while in Sasuke, they have re-merged back, almost into the Rinne Sharingan, but not completely.

The reason why I think Sasuke has a semi/pseudo-Rinne Sharingan is simple. Rinne Sharingan is a ONE eye, while Sasuke has 2 eyes and no single forehead eye, so you could say that Sasuke has the power of Rinne Sharingan but split between his left and right eyes.