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.
The leaked police log shows that, at 12:40, Peter 1 issued the order allowing the use of lethal fire.
，这一点在搜狗输入法下载中也有详细论述
В Финляндии предупредили об опасном шаге ЕС против России09:28
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