It seems like this is something will never be completely sure of, but does it really matter if it's true or not? I suppose one could adopt a nihilist viewpoint if they believe that we exist in a simulation.
The term 'simulacrum' reminded me directly of the science fiction writer Philip K. Dick, his novels usually deal with realities that aren't what they appear to be!
Great stuff.
RE: Are We Living In A Computer Simulation? (TURKISH/ENGLISH)