I'm not sure quite what you are asking there, Pied Piper, but some of us don't see "matter" and "spirit" as being separate at all. To us, it's just the perception of matter and spirit that seems to have separateness. And, as we know, perception is relative and not always testable.

(In other words, to some of us, matter is also "spirit", just in a different form than the more ethereal aspects of spirit. So for some of us, everythig is "spirit", matter included.)

We are the music makers. We
are the dreamers of the dreams.

--Arthur O'Shaughnessy