I am confused by this:
Perhaps you could ask them a question which logically follows from the expected answer to your actual question
Can you provide a worked example? Or explain it again? Or both?
Perhaps the most famous worked example is Have you stopped beating your wife?, an instance of a rhetorical device called begging the question; strictly speaking, this is Dark Arts, but since you are assumedly willing to immediately take a step back and change your mind about the assumption (as in, 'Oh, you're single' or 'Oh, you've never beaten her' or 'Oh, you only beat other people's wives') it should not be that bad.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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