A 1992 article by Bruce Bridgeman argues that thinking is itself simulation. “The idea of thinking as simulation brings up computer analogies and the present fascination with virtual reality, a human-computer interface that gives the user the impression of actually being in a computer-generated environment. But the brain itself sits in an isolated environment, carefully insulated from the real world, both physically and biochemically …. The only things going in and out are tiny depolarizations on millions of parallel axons. Somehow the brain translates these into a reality, a sense of being in the present time and place. We are always the willing victims of an illusion of virtual reality.”.
The article I quote from is part of a 10-year old colloquy. But I just like the way he puts it.