Originally Posted by Richard_Cranium
I thought in Chang's video he said " Don't let them near each other" meaning they cannot make contact. that is how i take it am I wrong?
We don't really know. However, given that the same rabbit was in the room twice and that Miles could see himself as a baby, we can ignore the idea that you can't be in the same time as your past/future self.
There may still be rules against making contact with yourself or something like that, but we don't know that for sure. But, like I said, we can definitely say that existing in the same time as your former/future self is a possibility.