Board Thread:Episode Discussion/@comment-5430952-20181103172633/@comment-27312496-20181104004313

Overlord1006 wrote:

However, I will argue that the Vault could have been opened by Raven back when she first became a Maiden, where she would have asked her question and closed up the Vault again, and Jinn's apparent familiarity with Ozpin could be explained by him being the God of Light all along or something to that effect.

Except Raven only became a Maiden relatively recently, after she took off when Yang was born. She would not have any time or way to get to the vault.