I did a thought experiment few years back: Is anything real if we live in a simulation? I came to conclusion that all physical laws, chemistry, the universe wou

I did a thought experiment few years back: Is anything real if we live in a simulation? I came to conclusion that all physical laws, chemistry, the universe would be simulated. And the only "truth" that is the same for host and simulation is math. Imagine that you're creating computer game - a limited simulation. You can change laws of physics, chemistry, life, etc... but math will always hold true. 1 + 1 will always be 2.