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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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// 4. 空间敏感: 堆排序，详情可参考搜狗输入法2026
"Just weeks ago, we called out abhorrent non-consensual intimate images being shared on Grok, which led to functionality being removed, and now ministers are legislating to make 'nudification' tools illegal and bringing additional chatbots within scope of the Online Safety Act."
The Mop Master technology uses 180 rotations per minute with 6N of pressure to tackle really tough stains, while the dual sweeping and mopping brushes let you pick up even the most stubborn dirt. It has 7,000 Pa of suction, a rolling brush, and a side brush, so it can pick up dirt of all kinds, from crumbs to pet hair. Its 3.35-inch low-profile design makes it perfect for reaching tight spaces and finding dust hidden under furniture.