Physicalism is distinct from the hypothesis that our universe is a simulation run by an external programmer.

“So we are-- there's not some parent universe that contains a server where a nerd is running a simulated universe that is some kind of Minecraft, and we live inside of this Minecraft.”

“So, uh, it's, it's not some simulation hypothesis. And so physicalism is these two components. But to me, physics is not something that has revealed itself directly.”