I asked ChatGPT a question then in a new window asked it to analyze a paragraph I randomly selected from its original answer to determine if it was written by ChatGPT. ChatGPT said the pattern of the text was highly unlikely to have been written by ChatGPT because it lacks the typical conversational tone and linguistic patterns found in ChatGPT-generated text.
Then back in the original question window I asked ChatGPT if that quoted paragraph was original generated text by ChatGPT and "it appears to be original text generated by me, ChatGPT".