So far we know some decent information about BBS. But what I have yet to hear the least bit about is why it is titled "Birth By Sleep." Nomura said the main focus of the game is to explain who Ven is. Now what does the birth by sleep have to do with him? It seems much more like it is going to be about what events transpired leading up to the secret ending we have seen, and less about who was born by someone sleeping. I'm hoping they clarify what this term means. Any ideas?