This certainly bears thinking upon …

… (9) Is This The Real Life? Or Just a Fantasy?

Although in principle it’s possible to simulate anything in a sufficiently powerful digital computer, there’s one inescapable difference between being simulated and being real.  If we’re real, we just exist.  If we’re simulated, we exist only so long as the simulation runs.  And since, presumably, the simulation will run only so long as whoever is running it finds it useful or interesting, if we’re living in a simulation, it behooves us to be interesting.