If the universe were a simulation then it would have been brought about for a purpose, to answer a certain question, for example, but this purpose would be a purely speculative one: in order to see whether or how ... something. Whatever this purpose might be would not be readable from within the simulation, which rather would go on internally with the greatest freedom possible. In the same way if the universe exists in order to realise the moral law this too would be an essentially speculative purpose and hence would not only explain the existence of evil, but every other kind of freedom. Whether in this case the purpose would be entirely inscrutable from within the universe would remain an open question - every such claim would have to be doubted, and every kind of subjective evidence too.