The Problem With Penrose's Argument

Under quantum gravity it may well be possible to build a quantum oracle machine just like these hypothetical machines and that they'll then be real. This is all based on a theory that doesn't exist and so we have to wait and see what that theory is, says Deutsch. "It really is hard to imagine science not starting with the assumption of mathematics and computability," he adds. 'Can you imagine someday scientists announcing we found this strange phenomenon that apparently can't be described mathematical it closed time'