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If Friend B guesses 16 and Friend C guesses 12, then they've both theoretically arrived at viable answers, because of 16 <19 and 12 <19. There is no 'extra credit' for Friend B, even though B's answer was closer to the target answer of 19. Now imagine that I pose the 'guess what number I'm thinking of' question, but I'm not asking just three friends, and I'm not thinking of a number between 1 and 100.