Why quotation marks around “good research”?

I put:

“good research”

in quotation marks because I am discussing the category as defined by a disciplinary community, not claiming that “good” has no objective meaning.

For example:

A historian may regard extensive primary-source evidence as a mark of good research.

The quotation marks signal:

“good” according to the standards being discussed.

“what counts as good research within a discipline”

because that clearly separates:

standards used by a community;

the possibility that those standards themselves can be rationally justified.