Science is the study of nature to discover the order within nature so as to be able to make predictions of nature.Once again I disagree. Science is a process by which observation is coupled with hypotheses and testing.
The phrase "mind stuff" seems more like a garbage can term for anything you want it to mean. Again, not useful in the present conversation.
Mind stuff is consciousness. It’s the only thing which can exist outside of space and time because it is no thing. Things can’t exist without creating space and time. Consciousness has no such limitation.
It’s like I’m free guy trying to explain to an npc that he’s an npc. Your reality doesn’t exist. It only exists as part of an alternate reality which we call the universe.