Board Thread:Wiki Discussions/@comment-24477541-20140328180624/@comment-3306440-20140330150239

AmaterasuAbuser wrote: The tablet's date of creation wasn't revealed, so it's impossible to know if it was either Indra or Madara that wrote it. We don't know what kind of person Indra was in truth or what became of him after fighting his brother, except that he also had a thirst for power similar to Sasuke's or Madara's. I bet on it's creation date to be around Madara's generation, as he was one of the two shinobi to awaken the Mangenkyo in a big amount of time ever since Indra's first usage of it. That leads to another plausible conclusion or specualtion: Madara wrote the tablet. We're kind of diverging a bit from the main topic, but from we've learned so far we can all agree that Madara was the first shinobi to awaken the MS in centuries.

Was Madara insane enough to decipher a tablet that he created? Yeah, what Elveonora said.