Of the Natural Order. Psyche has everything to do with Innate. From my studies, a person doesn't 'have' a psyche, the body is the expression of psyche. I'm aware that this terminology is usually a bit too woo-woo for the scientific community. But it is part of the limitations of the language system we're using.
Language is itself a metaphor.
We can't actually prove the existence of dreams, yet a great deal of dream study has been done in psychology. If that's your model, it won't. This has nothing to do with validation. In the context of the sentence, I was referring to the 'mainstreaming' of chiropractic that Joshua mentioned. I also don't think science dominates - it just is.