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:
Keeping open source sustainable is a global challenge, and the Open Source Endowment
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ChatGPT Health regularly misses the need for medical urgent care and frequently fails to detect suicidal ideation, a study of the AI platform has found, which experts worry could “feasibly lead to unnecessary harm and death”.，更多细节参见搜狗输入法2026
Script/BlockPairsMean SSIMLatin Extended450.572Hebrew50.471Cyrillic450.447Cherokee370.398Indic240.359Greek360.329Math Alphanumeric8060.302Arabic250.205
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