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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这和他「擅长表达」的传奇能力无关，却与他对简单、真实与纯粹的执念有关。