Another great episode of Doctor Who, Extremis. Brings up a twist of a not-so new concept that was introduced in StarTrek Holograms, Matrix (sort of), and now Doctor Who. Once technology is avanced enough, and characters in simulations become some advanced that they think they are real, how do you know if you are real or not? You feel real, you act real, your friends look real, but one day you find out that you are a simulation or a hologram inside a massive computer. You are Mario in SuperMario Brothers, a game created by advanced species to keep their pre-puberty teenagers entertained. A nice meaning in life
Is it possible that we are in a computer simulation?
Live Long and Prosper