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Reference.org
Classical logic
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<p>Classical logic (or standard logic) or Frege–Russell logic is the intensively studied and most widely used class of <a href="/facts/Deductive_logic/HadA1zWS">deductive logic</a>. Classical logic has had much influence on <a href="/facts/Analytic_philosophy/ALSWKaQa">analytic philosophy</a>. </p>