A computer that can simulate a better computer is a theoretical concept in ArCHeRian philosophy. In his own words,

A simulated computer can't be faster than the computer that's simulating it, right? Well, what if the computer isn't simulating the computations? What if it's merely simulating the motion of the particles that make up the computer? What if the government finds out and decides to take over the project? What if they dedicate government resources into building a massive simulation of a massive supercomputer in an absolutely perfect computing universe? Where would the limits be of that computer? Could you ask it the meaning of life? Could it give an answer?

—ArCHeR, this here thread

The concept was later broadened to other applications, such as acting.