ChatGPT was instrumental in convincing him that he was correct and his doctors were wrong. He would post his ChatGPT conversations as proof, but we could see that his prompts were becoming obvious leading questions.
He would phrase things like “Is it possible for {symptoms} to be caused by {condition} and could it be treated by {herbal product}?” Then ChatGPT would give him a wall of text saying that it’s possible, which he took as confirmation of being correct.
It was scary to see how much ChatGPT turned into a mirror for what he wanted to be told. He got very good at getting the answers he wanted. He could dismiss answers that disagreed as being hallucinations or being artifacts of an overly protective system. With enough repeat questioning and adjusting his prompts he could get it to say almost whatever he wanted to hear.
ChatGPT is rocket fuel for hypochondriacs. Makes WebMD look tame.