The universe is not a simulation.
The argument that the universe is a simulation is based on flawed reasoning and bad science.
They all believe it. Elon Musk says it’s almost certain. Scientists such as Neil deGrasse Tyson and philosophers such as Nick Bostrom argue that our universe is likely a simulation, running on sophisticated computing hardware in a “real” universe, the plaything of the Godlike beings who created us. While researchers at Oxford have experimentally shown that the universe cannot be simulated using classical algorithms, it remains to be seen whether more advanced, quantum computing methods could. But philosophically, these arguments are based on a flawed belief in the reality of Bayesian probability, which falsely imposes our own mental constructs on reality to prove things about nature.
If you’ve read my articles on how space and time might be illusions or why objective reality might be an illusion or even why you don’t have to believe in the multiverse, you might have noticed a theme developing. All experience is part of an elaborate illusion, but I have never argued that nothing is real. Rather, the universe is an infinite kaleidoscope of perspectives. The illusion is when we believe in one of those perspectives because it soothes our philosophical yearnings.