What if say only 5% of people within each discipline do so, what is the epistemic value then of the claim "Archeology & history claim to be scientific"?

I don't know what you mean, sorry

Ok, as a thought experiment, let's say there are only 100 archaeologists in the world, and you do a survey:

"Is archaeology a science?"

95 say no, 5 say yes.

Is "Archaeologists claim archaeology is a science" a true statement?

I have no idea how this relates to the conversation

This is highly relevant to my interests, thank you for disclosing that.