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<a accesskey="3" href="page.php?w=Classical_logic&amp;p=2">3.Next</a>
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<p><b>Classical logic</b> (or <b>standard logic</b>) or <b>Frege-Russell logic</b> is the intensively studied and most widely used class of <a href="page.php?w=deductive_reasoning">deductive logic</a>. Classical logic has had much influence on <a href="page.php?w=analytic_philosophy">analytic philosophy</a>.</p>

<p><big>Characteristics</big></p>
<p>Each logical system in this class shares characteristic properties:<br/>
# <a href="page.php?w=Law_of_excluded_middle">Law of excluded middle</a> and <a href="page.php?w=double_negation_elimination">double negation elimination</a><br/></p><p>
<a accesskey="3" href="page.php?w=Classical_logic&amp;p=2">3.Next</a>
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