Is dualism and empirical question?

I am not sure that dualism is an empirical question. The implications of materialism might be such that, if materialism were true, no one would believe anything on the basis of evidence. After all, inference based on evidence logically entails mental causation, but if materialism is true, then all causation is physical, and therefore nonmental causation. Thus the success of science doesn't support materialism, it refutes it. The more evidence we have that science works, the more proof there is that there is real mental causation, which is logically incompatible with materialism. 

Is the claim "No one believes anything for a reason" an empirical question? If we look at the world and conclude that that proposition is true, then that would work only if it is possible to reach conclusions on the basis of reasons, which in turn is impossible unless there is mental causation and materialism is false. Science could never reach the conclusion that it is true unless it is prepared to blow itself up and condemn itself and every other human epistemic endeavor as hopelessly irrational.