What is a concise term for the idea that membership grants special knowledge or expertise?
Solution 1:
Further research has led me to the Identity Fallacy, in which "the validity of one's logic, evidence, experience or arguments depends not on their own strength but rather on whether the one arguing is a member of a given social class, generation, nationality, religious or ethnic group, color, gender or sexual orientation, profession, occupation or subgroup (1)"
(1) Public domain, "Master List of Logical Fallacies," http://utminers.utep.edu/omwilliamson/ENGL1311/fallacies.htm