Advaita Vedanta, Theosophy, Spiritualism
(your reply in reference to my example of 'and things like the existence of God or the existence of a real spiritual plane of reality.')Depends on how they're defined.
I am saying they are defined in such a way that they cannot be proved/disproved by current science. I'm saying a 'Scientism' person would not hold such beliefs. This makes 'Scientism' not just a pejorative word but a valid philosophy like empiricism.