Speaking of testable, knowable, metaphysics, etc... Math and physics are strange partners. In pure math, there is no truth- just conditional truth. If A is true, then B follows, but there is nothing to say that A is true in the first place.
Physics, in it's simplest form, is the study of nature. It uses math as a framework, but at the end of the day, physicists still have to reconcile the difference between reality and that underlying mathematical paradigm. Sometimes it fits well, and other times, nature is wrong.
An astrophysicist, a physicist, and a mathematician are riding in a train across Scotland. They see a lone black sheep in the distance through the window.
The astrophysicist declares, "All sheep are black!"
The physicist quickly interjects, "All sheep
in Scotland, are black!"
The mathematician corrects them both, "In Scotland, there exists at least one sheep, of which, at least one side is black."
My point in a round about way, is that I think that this Creation vs Evolution, or whatever it is we're debating, are two sides to the same coin. They just start with different underlying axiomatic beliefs. I've often thought that we should change this to the "First Person to Convert Owes $20" thread- if someone's beliefs are changed because of this thread, they owe the person that converted them $20- game on!