The best way to figure out if an artificial intelligence wrote something may be to ask AI. We test AI-detection services with text written by ChatGPT and text written by a human: Here are the results. Educators are at the top of the list of those who could use a reliable way to tell whether something has been written by an AI. And they have indeed been among the early adopters of AI detector software. But just as ChatGPT and its kind can be unreliable, so are the AI detectors.