I have also tested it retroactively on some tricky debugging sessions that I had previously spent a lot of time on. It really goes down the wrong path. Without asking leading questions and, well, proper prompting, you may end up wasting a lot of time. But that's the thing - when you're investigating something, you don't know the root cause ahead of time, you _can't_ ask questions that'll nudge it in the right direction. It ends up being a case of blind leading the blind.