sjrwheeler wrote:The method doesn't need to be good, effective, convincing or deceptive.
"You thought of the nine of clubs. If not, then tell me your card."
That's a solution that is not good, convincing or deceptive. And, per your conditions, it doesn't involve asking questions. It is effective, presuming the person provides the information rather than leaving the room.
You might want to adjust your parameters.