Board Thread:Versus Debates/@comment-32466165-20170722022140/@comment-734582-20170823114417

Naruto Gaiden clearly shows that Sasuke's eye is a Rinnegan and Mangekyou coexisting. The Mangekyou manifests in the rinnegan as 6 tomoe.

That's it. No need for semantics over language. Whatever kekkei genkai makes the Rinnegan + Sharingan a singular Rinne Sharingan, is clearly absent in Sasuke. And in madara, whatever KKG allowed them to both be active in the same eye was clearly absent.

So no, Sasuke's eye is not a Rinne Sharingan. Kaguya and Madara's third eye is.