It wouldn't be too hard to program at least gpt3 to basically take a chatGPT answer, go to google, scrape results and verify if the chatGPT answer was factual or not and maybe give it a score or rating of factual-ness.
Simple answer adhd, if I could ship a product I'd already probably be rich, instead I'm scraping by as a freelance dev. Though, chatGPT probably could help me code it anyways lol.