Opening paragraph clearly frames the challenge: I have had the following experience more than once: I am speaking with a professional academic who is a liberal

Opening paragraph clearly frames the challenge: I have had the following experience more than once: I am speaking with a professional academic who is a liberal. The subject of the underrepresentation of conservatives in academia comes up. My interlocutor admits that this is indeed a reality, but says the reason why conservatives are underrepresented in academia is because they don't want to be there, or they're just not smart enough to cut it. I say: "That's interesting. For which other underrepresented groups do you think that's true?" An uncomfortable silence follows.