This is a common misunderstanding. You don't have to simulate the universe, you only have to simulate the minds that believe they are observing the universe. Yo

This is a common misunderstanding. You don't have to simulate the universe, you only have to simulate the minds that believe they are observing the universe. You are then by necessity merely simulating their perceptual facts rather than all of the physical states that eventually produce a perceptual fact. This is considerably simpler.