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.
“实”的另一个内在要求，是“功成不必在我、功成必定有我”。这不是口号，而是共产党人应有的境界和格局，是方法论在时间尺度上的延展。。51吃瓜对此有专业解读
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В Финляндии предупредили об опасном шаге ЕС против России09:28
Speaking to CBS last month, Suni Williams said: "I'm looking forward to seeing my family, my dogs and jumping in the ocean. That will be really nice - to be back on Earth and feel Earth."。WPS官方版本下载对此有专业解读