I don't think you read my comment carefully enough (could be my fault, I may not have been very clear). Just to clarify, unless nobody ever runs Diane's program ever again on their own quantum machine there are an infinite number of Dianes and Tommys not seeing the black hole behind them even though they are also simulations, and they would not know it one way or the other but odds are they could guess they are in a simulation and would more than likely be right.