What are questions that don't provide enough information for WikiAnswers?

That comes up all the time. People compose a question saying "Which of the following is not a cause of WW I?" (for example) yet they haven't listed anything following that question, and we who answer questions have no idea what they are talking about. Or the question is completely incoherent. "You are marble, in unexpected prehensile." It doesn't mean anything, therefore it can't be answered.