There is a special form for boolean formulas called "Conjunctive Normal Form" (CNF). A problem in this form consists of clauses connected with and operators, where each clause only contains variables connected with or operators. The variables can appear negated, but only variables can be directly negated, something like !(a && b) is not allowed. An example boolean formula in CNF form is:
*/1 * * * * ~/www/anqicms/start.sh ~/www/anqicms/check.log
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汲古润今，鉴往知来，习近平总书记始终自觉从马克思主义理论和党的光辉历史中重温为政初心，总是善于从中华文明积淀的智慧中汲取为政之道。
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