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<div><span class="kw">theorem </span><a NAME="T71"><span class="comment"><font color="firebrick">:: PL_AXIOM:71</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="pl_axiom.html#K1" title="PL_AXIOM:func.1">PL-WFF</a>  holds <br/> ( <font color="Olive" title="b1">A</font> is  <a href="pl_axiom.html#V3" title="PL_AXIOM:attr.3">tautology</a>  iff  <a href="subset_1.html#K1" title="SUBSET_1:func.1">{}</a> <a href="pl_axiom.html#K1" title="PL_AXIOM:func.1">PL-WFF</a> <a href="pl_axiom.html#R6" title="PL_AXIOM:pred.6">|-</a> <font color="Olive" title="b1">A</font> ) <span class="kw">by</span> <span class="lab"><a class="ref" href="pl_axiom.html#T27" target="_self" onmouseover="rs('pl_axiom/T27')" onmouseout="rh()">tautsat</a>, <a class="ref" href="pl_axiom.html#T56" target="_self" onmouseover="rs('pl_axiom/T56')" onmouseout="rh()">sth</a>, <a class="ref" href="pl_axiom.html#T70" target="_self" onmouseover="rs('pl_axiom/T70')" onmouseout="rh()">ct</a></span>;<br/></div></div>
