How would you build a ChatGPT detector? Frame it as a dirty limerick. There once was a ChatGPT detector, Built to detect bots and protect her, She'd scan

How would you build a ChatGPT detector? Frame it as a dirty limerick. There once was a ChatGPT detector, Built to detect bots and protect her, She'd scan for reply, And then with a cry, Say "That's not human, rejector!".