I don't know about 'delusion pattern', but a common problem is that the AI wants to be helpful, and the AI is sycophantic, so when you are going down an unprodu

I don't know about 'delusion pattern', but a common problem is that the AI wants to be helpful, and the AI is sycophantic, so when you are going down an unproductive path the AI will continue to help you and reinforce whatever you are feeling. This can be very hard to notice if you are an optimistic person who is process oriented, because you can keep working on the process forever and the AI will keep telling you that it is useful. The problem with this of course is that you never know if you are actually creating anything useful or not without real human feedback. If he can't explain what he is doing adequately then ask him to have the AI do it and read that. You should figure out pretty quickly if it is bullshit or not. If he can't get the AI to tell you what it is he is doing, and he can't explain it in a way that makes sense, then alarm bells should ring.