Well, as the simulations run and are interfered with, the higher up simulations will diverge more and more from those lower down. An interesting direction this

Well, as the simulations run and are interfered with, the higher up simulations will diverge more and more from those lower down. An interesting direction this could go in would be if eventually a low-level universe created a person who was needed in a higher universe. Then we could have avatars being created in higher up universes to enable simulated beings to interact, perhaps even up to the top level...