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<b>let </b><font color="Maroon">p</font> be    <a href="subset_1.html#M2">Element</a> of  <a href="cqc_lang.html#K7">CQC-WFF</a> ;<br/><b>let </b><font color="Maroon">q</font> be    <a href="subset_1.html#M2">Element</a> of  <a href="cqc_lang.html#K7">CQC-WFF</a> ;<br/><b>let </b><font color="Maroon">x</font> be   <a href="qc_lang1.html#NM3">bound_QC-variable</a>;<br/><b>let </b><font color="Maroon">y</font> be   <a href="qc_lang1.html#NM3">bound_QC-variable</a>;<br/>







<b>assume </b><a NAME="E1:43"/><i><font color="Green">E39</font></i>: 
<font color="Maroon">p</font> <a href="cqc_the3.html#R5" target="_self">|-|</a> <font color="Maroon">q</font>
 ;<br/>

<a NAME="E2:43"/>
 <a href="cqc_lang.html#K15">All</a> <font color="Maroon">x</font>,<font color="Maroon">p</font> <a href="cqc_the3.html#R5" target="_self">|-|</a> <font color="Maroon">p</font>
 
<b>by </b><i/>;<br/>
<a NAME="E3:43"/><b>then </b><i><font color="Green">E42</font></i>: 
 <a href="cqc_lang.html#K15">All</a> <font color="Maroon">x</font>,<font color="Maroon">p</font> <a href="cqc_the3.html#R5" target="_self">|-|</a> <font color="Maroon">q</font>
 
<b>by </b><i>, </i>;<br/>
<a NAME="E4:43"/>
<font color="Maroon">q</font> <a href="cqc_the3.html#R5" target="_self">|-|</a>  <a href="cqc_lang.html#K15">All</a> <font color="Maroon">y</font>,<font color="Maroon">q</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E5:43"/>
 <a href="cqc_lang.html#K15">All</a> <font color="Maroon">x</font>,<font color="Maroon">p</font> <a href="cqc_the3.html#R5" target="_self">|-|</a>  <a href="cqc_lang.html#K15">All</a> <font color="Maroon">y</font>,<font color="Maroon">q</font>
 <b>by </b><i>, </i>;<br/>


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