The Hollywood blockbuster "The Matrix" celebrated its 20th anniversary in March. The movie centers around the philosophical concept that our reality may not be real. The film's protagonist discovers that his world is a vast simulation run by hyper-intelligent AI. Since "The Matrix" came out, many scientists and philosophers have discussed the validity of the movie's claims. Nick Bostrum ? an Oxford philosopher whose ideas have been echoed by Elon Musk ? has argued that more likely than not, everyone on Earth today is living in a simulation.