[sdwr]

I think it's a lot more interesting to look for practical markers of simulation than do a teleological thought experiment.

How would a simulated universe differ from a "real" one? How would the simulation cut corners to save resources? Maybe the laws of physics are designed not just to produce interesting results, but also to be efficient to run.

Karl Friston and Steven Wolfram are sniffing around here, with cellular automata and free energy describing ways of partitioning space so it's cheaper to update