Aaaaaaah, I forgot to mention something important! Quantum physics! According to my big brother, a particle can have many possible properties, but only when it reaches a critical point does it become "fixed". This would imply that there can be many futures and, through quantum hazards and time paradoxy thingies, even a mind all-knowing of the present circumstance would not be able to predict future events.

And I haven't heard about Bell's theorem, I'll put it in a new tab and read it in a bit, since I'm way too sleepy and think I'm going to sleep for a few hours. Dying.