The Universe Really Is Complicated, Right?

It's not just that we're using simple laws, because we're simple people. It's that there is this kind of macroscopic simplicity out of this kind of incredibly complicated stuff going on. And when I'm taking an approximation of something because I can't do the full calculation, I'm taking the first, second, third order of perturbation theory. So if the universe was just chaos and fuzz, then that wouldn't work. If we could, maybe we'd use those instead to understand the ball, go across the room.