I think this is a common therapeutic technique and can actually be helpful with some clients. The therapist takes his best guess about what is going on with the client, and then the client tells him whether he is on the mark or not, and if not, corrects the "guess" to what is right. This is a way therapists can get the dialog going with clients who are not forthcoming, who don't say what the matter is. So the T guesses and the client corrects, and T ends up with a better idea of what is going on with the client. My daughter's T does this with her a lot. She is young and not a skilled conversationalist yet, and just can sometimes not express herself. So this helps her T find out what is going on with her. Her T has told me that sometimes they do entire sessions using this technique.