I agree that if there were non-material phenomena that had reliable reproducible effects on the material world then these effects certainly would be open to verification by science. The two problems with this are that A) having identified such an effect and ruled out a material explanation there would be nowhere to go if it were truly non-material and B) at the moment no such phenomena have been identified.
It isn't just science that is inequipped to study the immaterial, any material entity is as well. We could identify an effect but we couldn't identify or study its origin. If we investigated psychic powers and clearly showed they were a genuine phenomenon then if we could exclude a material basis in brain function, something which itself would be next to impossible, then where do we go? That is essentialy the end of any science related to the origin of psychic phenomena. We can study the effects and limits of psychic powers but we cant say anything about why or how they work, the science of the origins of psychic phenomena has just stopped working.
One can posit a non-material source for a phenomenon, but once you have then there is nowhere to go.
TTFN,
WK
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