We don't know, and mathematics is not the tool for that. The consistency of nature is considered by some to be one of the few things science has to take by fait

We don't know, and mathematics is not the tool for that. The consistency of nature is considered by some to be one of the few things science has to take by faith. Same thing with "brain-in-a-jar" arguments, we cannot ever prove that we are not just being completely fooled by our senses that our universe exists.