You do not simulate timelines, now you make a binary choice. From that point on, two realities exist in a state of quantum superposition, diverging from the point of that choice and lasting until one possibility is dropped. Like superposition, once one 'reality' is chosen, the two realities resolve like a collapsing wave function back to the actual reality that's left. Due to this, the effects of Meta-Knowledge and similar effect doesn’t affect your power.