If I understand you correct, it is not important that you know if it before it happened, because literally no evidence will have arrived until it does. Except that is not correct. Your knowledge is literally and entirely evidence so something did arrive. Effectively you are in a timeline that is behind the event’s timeline.

But more to the point, you could take this knowledge, fold the universe again, and being that you are in a timeline prior to the event, you could arrive at the source event before it happened. And stop it. The paradox then. How did you know to do something that never happened?