General

I would sort by target actually.

In other words, if the cultural anthropology query is either about cultural anthropology (as a topic) or is about cultural anthropology as applies to some primary world culture, then I'd think that would sort into the Science Department. If the query is about either fictional cultural anthropology (i.e., as a fictional science) or else applies to a culture in a secondary world, then I'd think it should sort into the Worldbuilding Department.