Well humans wouldn't exist in such a universe, and couldn't observe it. But even if you started with a completely random cellular automata, it's often common f

Well humans wouldn't exist in such a universe, and couldn't observe it. But even if you started with a completely random cellular automata, it's often common for order and structure to emerge. You could even say that entropy is going in reverse. But causation and the arrow of time still only flows one direction. Perhaps given enough time, life could evolve in such a universe, and ask why time only goes one direction.