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<b>let </b><font color="Maroon">F</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="qc_lang1.html#K8">QC-WFF</a> ;<br/><b>let </b><font color="Maroon">G</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="qc_lang1.html#K8">QC-WFF</a> ;<br/>



<a NAME="E1:29"/>
(  <a href="qc_lang2.html#K12" target="_self">the_antecedent_of</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">F</font> &amp;  <a href="qc_lang2.html#NK13" target="_self">the_consequent_of</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">G</font> &amp;  <a href="qc_lang1.html#K18">the_left_argument_of</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="qc_lang1.html#K13">'&amp;'</a> <span class="p2">(<span class="default"><font color="Maroon">G</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">F</font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">F</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">G</font> &amp;  <a href="qc_lang1.html#K19">the_right_argument_of</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="qc_lang1.html#K13">'&amp;'</a> <span class="p2">(<span class="default"><font color="Maroon">G</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">F</font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">G</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">F</font> &amp; <font color="Maroon">F</font> <a href="qc_lang2.html#K4" target="_self">&lt;=&gt;</a> <font color="Maroon">G</font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="qc_lang1.html#K13">'&amp;'</a> <span class="p1">(<span class="default"><font color="Maroon">G</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">F</font></span>)</span> )
 
<b>by </b><i>, </i>;<br/>
<b>hence </b><a NAME="E2:29"/>
(  <a href="qc_lang2.html#K13" target="_self">the_left_side_of</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K4" target="_self">&lt;=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">F</font> &amp;  <a href="qc_lang2.html#K14" target="_self">the_right_side_of</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K4" target="_self">&lt;=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">G</font> &amp;  <a href="qc_lang1.html#K18">the_left_argument_of</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K4" target="_self">&lt;=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">F</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">G</font> &amp;  <a href="qc_lang1.html#K19">the_right_argument_of</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="qc_lang2.html#K4" target="_self">&lt;=&gt;</a> <font color="Maroon">G</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">G</font> <a href="qc_lang2.html#K2" target="_self">=&gt;</a> <font color="Maroon">F</font> )
 ;<br/>


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