I feel at home with physical materialism and I like the way it's simultaneously simple, self-consistent and powerful as a theory for generating explanation (immediately: all of science). Yet there are some interesting issues that come up when I think about the justification of this world view.

The more complex hypothesis that there is 'more' than X would be favored by any evidence whatsoever that X is not completely self-contained. So then it becomes an argument about what counts as evidence, and "real" experience. The catch-22 is that any evidence that would argue for the metaphysical would either be rejected within X as NOT REAL or, if it was actually real -- in other words, observable, reproducible, explainable -- then it would just be incorporated as part of X. So it is impossible to refute the completeness of X from within X. (For example, even while QM observations are challenging causality, locality, counterfactual definiteness, etc., physicists are looking to understand X better, and modify X as needed, not rejecting the possibility of a coherent theory of X. But at what point are we going to recover the world that the metaphysicists meant all along? )

So the irrefutability of physical materialism is alarming, and the obstinate stance for 'something else' from the majority of my species leaves me interested in the question. I have nothing to lose from a refutation of either hypotheses, I'm just curious. Also despairing to some extent -- I believe such a questions are actually outside definitive epistemology.