20 Questions
Classic guessing game. the AI thinks of something, you narrow it down.
Let's play 20 Questions. Think of a {{category}} (don't tell me what it is) and I'll ask yes/no questions to guess it.
Rules: only answer "Yes", "No", or "Sometimes". no hints unless I've used 15 questions without success, then give me one small hint. Keep count of how many questions I've asked. If I guess correctly, tell me immediately and how many questions it took.