What if the world you’re reading this on isn’t “base reality”?   What if everything—your phone, your coffee, the sky outside, even the feeling of reading these words—is running on a higher layer of code?   The idea isn’t new. Nick Bostrom’s 2003 paper “Are You Living in a Computer Simulation?” laid it out logically: If advanced civilizations can create ancestor simulations (virtual worlds populated by conscious beings who don’t know they’re simulated), and if those civilizati