Squeak, that’s actually pretty good 🙂
An “Enlightened” man was walking down the street without a yarmulke. (Note: These were the times of the actual enlightenment and these people were real apikorsim, not tinokos shenishbos like today.) The Rebbe goes over to him and asks,
“Tell me, are you a kohein or a Levi?”
“Why would you think I’m a kohein or a Levi?” he asked, surprised.
“Because you certainly don’t look like a Yisroel.” 🙂