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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Trade between the EU and two South American countries may start within two months under a provision application of the deal
第八十三条 承运人和托运人协商一致，可以签发、使用电子运输记录。