Unless the simulator that we are inside is somehow designed such that it itself cannot be simulated from within. An analogy for this might be to imagine people

Unless the simulator that we are inside is somehow designed such that it itself cannot be simulated from within. An analogy for this might be to imagine people being simulated inside a machine that is not theoretically Turing-complete. Not that I believe in such a thing - at this point the argument would devolve into something unfalsifiable, since the way that logic works outside of our simulated universe would not be same way that logic works inside, and you'd just have to take my word for it that the simulation is being run by an infinitely stacked series of hyperintelligent turtles, since you cannot use "inside logic" to prove anything about anything that is "outside."