Board Thread:Theories and Speculation/@comment-30355627-20161218164138/@comment-734582-20161226090515

Elveonora wrote: It's possible Hagoromo got the Sharingan too, hence how Indra inherited it. Just because he wasn't shown using it in the manga doesn't mean he didn't have it. Judging by Madara and how Hagoromo awakened it in the Anime, Rinnegan supersedes Sharingan. Hagoromo may possess it, but cannot simultaneously use it with Sharingan. Or he simply never went through sufficient hardship to awaken it. But again, Hagoromo says that Indra inherited Kaguya's eye, a Sharingan, suggesting Hagoromo never had it.

Sasuke seems to be different, likely because Hagoromo ensured Sasuke could use either power.

Elveonora wrote: There's literally only 3 reasons why people falsely believe that Rinnegan is final stage of Sharingan/Sharingan is what changes into the Rinnegan or whatever: There's a fourth: It kind of makes sense that the clan known for their godawefully strong Dojutsu would awaken essentially the King of Dojutsu. But that idea exists because we never saw the opposite, and we never really got the specifics of the Rinnegan either. Genetically the Rinnegan should be a dojutsu of BOTH transmigrants (meaning either Ashura or Indra transmigrants should be able to get it), but there's only ever talk of Indra transmigrants trying to get it.