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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Ученые нашли необычное применение рыбамРоссийские ученые научились отслеживать загрязнение водоемов с помощью рыб
第六十一条 本法下列用语的含义：
echo "anqicms is not running. Starting it..."