There was a thread like this at another forum to which I used to belong, and I just loved it. Basically, all posts in this thread can only be questions. You respond to a posted question with another question. They can be silly questions, it doesn't have to make sense all the time (or ever); they can be questions about anything you like (which will probably be Jesus), they can be simple questions (like, "Do you like cheese?") or complicated ones (like, "What is the meaning of life?"), but all posts must questions. So...
Who wants to play?
Who wants to play?
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