To get to Cantor&#x27;s theories you have to accept his concept of a &quot;completed infinity&quot;.  This implies that infinity is a metaphysical concept, i.e. that infinity really exists in the universe.  For example, do you believe that black holes are really infinite density or does an infinite property indicate a breakdown in the equations or theory, i.e. infinity is an epistemological concept.  Modern physics is not consistent on this question but the error and question all derive from Kant.