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:
TL;DR: Lego is running Star Wars make and take events on March 7-8. A limited quantity of Lego Star Wars Lightsabers will be available for free at participating stores in the UK.
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Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00560-6，这一点在搜狗输入法2026中也有详细论述
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