Chat GPT is feeding itself information from the web to provide answers to search queries. Lots of information on the web is inaccurate and at times blatantly false. When a query comes back with bad info and the user uses that info in a article or blog post, it keeps feeding the engine of Chat GPT with inaccurate information. So Chat GPT is getting dumber. For now you need to be careful and vet what Chat GPT is giving you. It will take time for it to decipher good info from bad info.