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.
Koch said it was an amazing feeling to see the rocket.
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Histories of the ATM usually focus on just that: the ATM. It's an interesting
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克林顿此前承认在2002年至2003年间，曾四次搭乘爱泼斯坦的私人飞机出行，行程与克林顿基金会的人道主义工作相关，目的地包括欧洲、亚洲和非洲，但明确否认曾到访过爱泼斯坦位于美属维尔京群岛的私人岛屿。