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<div><span class="kw">theorem </span><a NAME="T31"><span class="comment"><font color="firebrick">:: ZF_LANG1:31</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">F</font>, <font color="Olive" title="b2">G</font> being   <a href="zf_lang.html#NM2" title="ZF_LANG:NM.2">ZF-formula</a> holds   <a href="zf_lang.html#K19" title="ZF_LANG:func.19">the_argument_of</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">F</font> <a href="zf_lang.html#K10" title="ZF_LANG:func.10">=&gt;</a> <font color="Olive" title="b2">G</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b1">F</font> <a href="zf_lang.html#K6" title="ZF_LANG:func.6">'&amp;'</a> <span class="p1">(<span class="default"><a href="zf_lang.html#K5" title="ZF_LANG:func.5">'not'</a> <font color="Olive" title="b2">G</font></span>)</span> <span class="kw">by</span> <span class="lab"><a class="ref" href="zf_lang1.html#T3" target="_self" onmouseover="rs('zf_lang1/T3')" onmouseout="rh()">Th3</a></span>;<br/></div></div>
