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.
文学史上很多传世之作，初稿都惨不忍睹，被编辑删改得七荤八素。比如美国作家卡佛以“极简主义”著称，这背后不完全是作家本人信奉极简理念，还是编辑逼着他成了“主义”。所以给你个建议，给自己设定一个“编辑”：写初稿时，让内心的编辑去边上喝茶，看闲书，不要打扰你，改稿时，再礼貌地请他回来开工。，更多细节参见WPS下载最新地址
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ProWritingAid helps you clean up your writing by checking for style, structure, and content while Grammarly focuses on grammar and punctuation.
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