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SAT (short for "satisfiability") is a logic problem that given a boolean formula, it asks whether the boolean formula has an assignment that makes the problem true. An example boolean formula is:
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近年来，与日本众多偏远地区现状相似，会津正面临人口快速萎缩、农业劳动力短缺以及耕地大面积荒废等严峻挑战。