It is quite popular in the media these days to think of the universe as a simulation. But what kind of simulation could this be? First off, what is the difference between something that is "real" and a simulation? The revelation would be that there is no difference between what we consider real and what we behold as simulated.

Indeed, billions of dollars could be used to prove we are in a simulation. However, that venture must begin with a theoretical investigation. And theoretical physics is the correct domain to begin this venture, by discovering the unified theory.

So what is a unified theory? Is it a theory of our observable universe? Or can we do much better and discover the theory behind all possible simulated universes? The answer should be clear.