I wonder how long it will take machines to get good at the 2nd part mentioned in the article, the 20 questions part where they try to figure out causes using on

I wonder how long it will take machines to get good at the 2nd part mentioned in the article, the 20 questions part where they try to figure out causes using only the conversation. For neurological disorders you also need an agent that can actually do a manipulative exam to figure out what is wrong. Machines are still far from having the full spectrum of agency needed to preform exams to find the underlying source of a problem. Of course it is extremely rare to find a human being who can do those as well...