Two men are drinking in a bar. The first man tries to strike up a conversation with the second, but the second man says, "I'm sorry, I can't hear you, I'm deaf."
So the first man pulls out a pad of paper and a pencil, and they get a lively conversation going on paper. Soon a third man joins them, and all three are conversing on paper.
By and by the deaf man leaves, and the two hearing men continue their conversation -- on paper.
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