I know you’re being sarcastic, but I’ve integrated this idea into my bullshit detector. When I’m dealing with someone who purports to be an expert in a field I

I know you’re being sarcastic, but I’ve integrated this idea into my bullshit detector. When I’m dealing with someone who purports to be an expert in a field I know little about, I will try to steer the conversation towards things that I know a lot about—without disclosing that I know a lot about them. People will show you who they are if you let them.