Board Thread:Naruto Discussions/@comment-29393962-20161111215453/@comment-734582-20170114172629

UltimaDude wrote: The data book flat out states that you can only get SPSM from Hagoromo, therefore you can't awaken it yourself Madara says that he has both Sasuke's (rinnegan) and Naruto's (Six paths Senjutsu) power. So clearly the databook is in the wrong here.

EDIT:

I don't know how japanese precisely works, but technically Madara got Rinnegan from Hagoromo himself, since he awoke Hagoromo's chakra. In the same sense, SPSM can only be obtained with Hagoromo's chakra. And for all intents and purposes, Awakening hagoromo's chakra = getting it from Hagoromo himself.