Many disturbingly argue that eternal cosmic inflation predicts an infinite space with infinitely many planets, civilizations,

 Long a staple of science fiction, the idea that our external reality is some form of computer simulation has gained prominence with recent blockbuster movies like The Matrix

Many scientists have argued that simulated minds are both possible and imminent and, e.g., Tipler  Bostrom and Schmidhuber  have gone as far as discussing the probability that we are simulated .

This raises a question emphasized by Penrose is it possible to build a human impersonator that passes the Turing test, yet is in no sense sentient?

For example, since every universe simulation corresponds to a mathematical structure, and therefore already exists in the Level IV multiverse, does it in some meaningful sense exist “more” if it is in addition run on a computer? This question is further complicated by the fact that eternal inflation predicts an infinite space with infinitely many planets, civilizations, and computers, and that the Level IV multiverse includes an infinite number of possible simulations

 If one accepts David Hilbert’s dictum that “mathematical existence is merely freedom from contradiction”