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You can look for contradictions, inconsistencies or for macro scale phenomena not explainable by micro scale laws.

• danbruc 9y ago
  That doesn't work. The rules used by the simulator could just be the rules of the real universe, you can not tell the difference. Or to put in programming terms, you are given an object x to inspect, our universe, and you have to decide whether it is an instance of class RealUniverse or an instance of class SimulatedUniverse but you have no knowledge of what any of those classes looks or behaves like.
  • gilbetron 9y ago
    You seem to be arguing that it isn't always possible to detect you are in a simulation, whereas the rest of us are arguing that it could be possible in some simulations.
    • jamesrcole 9y ago
      I think they're arguing that whatever evidence you think you've found for it being a simulation could always just be how the universe is.