Materialists/physicalists seem to think you should only believe something that's provable. This limits belief to the subset of the physical universe provable by the scientific method.
This is way to black and white for me.
Reality is a lot a more nuanced then that.
"Provability" is to strong. Try "supportability". Not everything can be "proven".
Belief is also quite strong, as it expresses a form of certainty that I'm not necessarily comfortable with.
Try "considering things in various gradations of likelyness".
Probability, plausibility, etc.
When I'm 99% sure, I'ld probably use the word "believe", but I wouldn't be meaning the strict black or white use of the word where i consder the thing as being "true". Instead, it's just "highly likely".
An example of something not provable but worthy of belief: You meet someone you think you will become lifelong friends with. Certainly there is no scientific proof involved; merely intuition. It's OK to believe you might become lifelong friends with them.
That would be an expectation, again without expressing certainty. Yes, you could use the word "believe", but again you wouldn't be talking about the black or white use of the word.
What about scientific speculation; for example, multiple universes? Why do scientists even think about such things if they can't find a way to prove them? It's because they believe they could be true with no evidence they are true.
This is a misrepresentation, or likely a misunderstanding, of how multi-verse ideas found their way into a scientific narrative.
It's not like that's some independend idea that some scientist came up with in his head.
The multi-verse rather is a
prediction from theories that DO deal with the physical universe. Like Inflation Theory, which attempts to explain the initial expansion phase of the big bang. The multi-verse is a prediction that naturally flows from that model. Very simplisticly put, working out the math of the model ends up in math describing a multi-verse.
So really, if there is anyting being believed, then it is the theory that predicts it. If the theory is correct and accurate, then the predictions necessarily follow. It's like an argument. If the premises are correct and the logic is valid and sound, then the conclusion necessarily follows.
Off course, theories in science are never "believed", merely tentatively accepted. With various degrees of confidence (or "likelyness" or "plausibility" or "probability" or... anything but certainty).
The existence of the subjective experience of consciousness deviates from the scope of provable science enough to warrant believing it is outside the physical domain.
Huh?
Sounds like an argument from ignorance.
After all, all other emergent properties (such as the surface tension of water) are still physical, having atoms obeying the laws of physics. Yet there is no quantum field called "consciousness", so it may not be physical in essence.
Seems to me that consiouscness is what we call the experience of awareness, emergent from a physical brain. And thus fundamentally physical in nature.
That the process isn't fully explained neurologically to people's satisfaction (yet?) doesn't change that observation.