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<a NAME="E1:36_1_1"/>
 ex <font color="Olive">p</font>, <font color="Olive">q</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="qc_lang1.html#K8" target="_self">QC-WFF</a>  st <font color="Maroon">F</font> <a href="hidden.html#R1">=</a> <font color="Olive">p</font> <a href="qc_lang1.html#K13" target="_self">'&amp;'</a> <font color="Olive">q</font>
 
<b>by </b><i><a class="ref" href="qc_lang1.html#T4" target="_self">Th4</a>, </i>;<br/>
<b>hence </b><a NAME="E2:36_1_1"/>
 ex <font color="Olive">b<sub>1</sub></font> being  <a href="qc_lang1.html#NM8">QC-formula</a> ex <font color="Olive">p</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="qc_lang1.html#K8" target="_self">QC-WFF</a>  st <font color="Maroon">F</font> <a href="hidden.html#R1">=</a> <font color="Olive">p</font> <a href="qc_lang1.html#K13" target="_self">'&amp;'</a> <font color="Olive">b<sub>1</sub></font>
 ;<br/>


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