"Both she and Will agreed that once a potential future was witnessed that future then became inevitable."
- The same thing as a set past. Once you see something happen in Quantum Break, it can't be changed/undone.
Beth: "Hear me out. My Younger Self gives my Older Self the detonation times. My Older Self sets the bombs to those times. The bombs detonate. As they detonate my Older Self notes the exact timing of the explosions and writes them down in a new book. [...] My Older Self then gives my Younger Self this new book. My Younger Self transcribes those times into her own new book - the one that is a precise copy of the old book her Older Self gave her when she was eleven, so that she can in turn give it to her Younger Self, in 1999, when she becomes her Older Self. Then that eleven-year old Younger Self grows and becomes that same Older Self... an here we are."
Jack: "If I'm understanding this... that doesn't make sense. I mean, there has to be a point somewhere in there when that happens for the first time, right? When you don't have any of that information? When you can't set the bombs for the right times?"
Beth: "Yes and no. Yes, and this
is the first time, right now. And no, there is never a moment when I don't have the information. How much do you know about this stuff?"
Jack: "I skimmed a Terminator argument on Reddit once."
Beth: "No. The bottom line is: it works. The paradox is acounted for or factored out, because the behavior of fundamental particles on the quantum scale under certain conditions aren't strictly deterministic. They follow 'fuzzy rules'."
Jack: "What?"
Beth: "General relativity works just fine for predicting paradoxes, but once those paradoxes are considered in, or subjected to, quantum mechanical terms they pretty much vanish - provided causality is maintained."
- That's their way to explain the paradoxes