@cbontenbal @TimWardCam @graemearthur
My claim, specifically, is that everything that has ever been examined is either physical or has derived from the physical and nothing that humans ever examined has ever been proven to derive from something that isn't physical.
I'm not claiming that things can not derive from a non-physical source, but that there is no proof that things can derive from a non-physical source, and therefore, there is no rational reason to believe it.