This formula is satisfiable because if we set to b to true and a to false, then the whole formula is true. All other assignments make the formula false, but it doesn't change that the formula is satisfiable as long as there is at least one assignment makes the formula true.
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抓落实，是衡量领导干部党性和政绩观的重要标志。
Samsung Unpacked: Privacy display on the S26 Ultra looks amazing – 27:27