Is this the real life... is this just fantasy... Elon Musk thinks we're living in a computer simulation. And there's a reason. It's called the Simulation Argument. But some say that computer scientists have now proven that that's impossible. Who's right? And what does the blue pill do again? And why is this whole idea that life is an illusion so enduring? We appear to unscrew the cap on a spicey Argentinian Malbec and have a proper think.