Is the universe a simulation? Mathematical truths seem to be timeless and unchanging realities we discover rather than something we invent. But as fallible as we are, how could we ever discover these truths? One “possibility is that we live in a computer simulation based on the laws of mathematics — not in what we commonly take to be the real world. According to this theory, some highly advanced computer programmer of the future has devised this simulation, and we are unknowingly part of it. Thus when we discover a mathematical truth, we are simply discovering aspects of the code that the programmer used.”