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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E51">naab</font></span>: <a NAME="T60"><span class="comment"><font color="firebrick">:: PL_AXIOM:60</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font>, <font color="Olive" title="b2">B</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> <br/>  for <font color="Olive" title="b3">F</font> being   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <a href="pl_axiom.html#K1" title="PL_AXIOM:func.1">PL-WFF</a> holds  <font color="Olive" title="b3">F</font> <a href="pl_axiom.html#R6" title="PL_AXIOM:pred.6">|-</a> <span class="p1">(<span class="default"><a href="pl_axiom.html#K6" title="PL_AXIOM:func.6">'not'</a> <font color="Olive" title="b1">A</font></span>)</span> <a href="pl_axiom.html#K3" title="PL_AXIOM:func.3">=&gt;</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">A</font> <a href="pl_axiom.html#K3" title="PL_AXIOM:func.3">=&gt;</a> <font color="Olive" title="b2">B</font></span>)</span></div></div>
