These aren't niche tools used by tech enthusiasts. They're mainstream applications that everyday people now use for research, planning, learning, and decision-making. When someone searches for "best productivity apps for small teams," they're increasingly likely to ask an AI rather than Google. When a business owner needs to understand a technical topic, they're prompting Claude instead of reading blog posts. When students research topics for papers, they're querying Perplexity instead of clicking through search results.
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:
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香港警方回覆BBC表示，他們「依法辦事」，並「譴責任何惡意抹黑警隊及煽動公眾恐慌的企圖」。，这一点在Line官方版本下载中也有详细论述
Who are resident doctors, previously called junior doctors?