Board Thread:Wiki Discussions/@comment-1512913-20140521221412/@comment-28861328-20140521223135

Elveonora wrote: Hagoromo's Rinnegan split into Ashura and Indra's chakras ("body" and Sharingan) That alone is enough, since there being 2 Sharingans is impossible. It can't go Sharingan > Rinnegan > Sharingan, because the Rinnegan is the original stage of Sharingan. The antagonists haven't been attempting to create a new doujutsu, they recreate the original one. Rinnegan was already there before the Sharingan. The Sharingan is an evolution of the Rinnegan, by re-merging the sons' powers, the Sharingan essentially devolves back into its original form, the Rinnegan.

That proves nothing. For all you know, Hagoromo also had a Sharingan and advanced it to the Rinnegan due to his unique chakra and then simply passed it on. Madara and Kabuto both said it is the final evolution of the Sharingan, meaning Sharingan comes before Rinnegan. It is absolutely not a fact that the Rinnegan came first. You made that up.