ChatGPT is a text-generator. It has been fed books, articles, internet pages, dictionaries, and more.
ChatGPT does not have the ability to search the internet for information. It does not DO research. It merely accesses its own memory banks.
The Student Code of Conduct is being updated to include ChatGPT and other text generators. In the meantime, using ChatGPT is not allowed even with a "technicality" in the plagiarism definition. Student work must be their own, period.
Everything old is new again.