What this means is that the universe is solving a fixpoint equation: find a history that is self-consistent. The question this raises is, which one does it pick

What this means is that the universe is solving a fixpoint equation: find a history that is self-consistent. The question this raises is, which one does it pick? There are infinitely many to choose from, and no clear criteria that I know of. You can have a fixpoint where someone is their own parent, but what chose this fixpoint over any other? I don't mean "woah man, who get's to decide?", I mean "this description of physics is incomplete; to complete it you need to specify the method of selecting which fixpoint gets chosen".