Board Thread:Naruto Discussions/@comment-29393962-20161111215453/@comment-1512913-20170118212027

No disagreement about that considering that not only can Sasuke activate Sharingan in his Rinnegan eye and use both at once, but also it got manifested within minutes while it took Madara years. So most likely Hashirama's cells have nothing to do with Sasuke's Rinnegan, although he still may have them... Not really 100℅ proof if he does or doesn't tho