Strictly speaking the simulation only has to get better when someone looks. E.g. you only have to simulate full quantum mechanics when a scientist is doing spec

Strictly speaking the simulation only has to get better when someone looks. E.g. you only have to simulate full quantum mechanics when a scientist is doing specific experiments. Otherwise, you can get away with approximations. (And this is only a very small subset of experiments, like superconduction and superfluidity. Things like blackbody radiation are easy to simulate without quantum.)