(May 4, 2016 at 3:54 pm)Alasdair Ham Wrote:(May 4, 2016 at 3:40 pm)Stimbo Wrote: It can if non-physical issues supposedly cause physical effects. Then we can test for those.
I think for something to affect the physical world implies it is physical.
The Abrahamic religions all claim to worship a god who is non-physical but who (once upon a time) interacted directly and often with the physical world. Hell, he ate lunch with fucking Abraham!
Such a being, if it existed and affected the world through its interaction with it, would presumably leave effects that could be studied.