Board Thread:Naruto Discussions/@comment-34569788-20180504183427/@comment-35409024-20180505233248

I think Kabuto pumping Sasuke with Hashirama's cells is the only thing that makes sense on how he awakened Rinnegan. Because Hagoromo gave both, Naruto and Sasuke his Chakra. So if Sasuke awakened Rinnegan because he received the half Indra was lacking, that would mean Naruto also received the other half he needed and should of awakened Rinnegan as well. But he didn't. So that would mean something else occurred that gave Sasuke the boost he needed and not Naruto.

So either...

A] Hashirama's cells from Kabuto.

B] You really do need the Sharingan.

or

C] Another one of Kishimoto's bullshit inconsistencies.

Those are the only possible conclusions that make sense.