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<b>consider </b><font color="Maroon">c<sub>2</sub></font> being   <a href="qc_lang1.html#NM3">bound_QC-variable</a>, <font color="Maroon">c<sub>3</sub></font> being   <a href="qc_lang1.html#NM8">QC-formula</a><b> such that </b><br/><a NAME="E2:22_1_1"/><i><font color="Green">E26</font></i>: 
<font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="qc_lang2.html#K5">Ex</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font>
 <b>by </b><i><a class="txt" href="goedelcp.html#E1:22"><i><font color="Green">E25</font></i></a>, <a class="ref" href="qc_lang2.html#D13">QC_LANG2:def 13</a></i>;<br/>
<a NAME="E3:22_1_1"/>
<font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="qc_lang1.html#K12">'not'</a> <span class="p1">(<span class="default"><a href="qc_lang1.html#K14">All</a> <font color="Maroon">c<sub>2</sub></font>,<span class="p2">(<span class="default"><a href="qc_lang1.html#K12">'not'</a> <font color="Maroon">c<sub>3</sub></font></span>)</span></span>)</span>
 
<b>by </b><i><a class="txt" href="goedelcp.html#E2:22_1_1"><i><font color="Green">E26</font></i></a>, <a class="ref" href="qc_lang2.html#D5">QC_LANG2:def 5</a></i>;<br/>
<a NAME="E4:22_1_1"/><b>then </b>
 <a href="qc_lang1.html#K14">All</a> <font color="Maroon">c<sub>2</sub></font>,<span class="p1">(<span class="default"><a href="qc_lang1.html#K12">'not'</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> is    <a href="subset_1.html#M2">Element</a> of  <a href="cqc_lang.html#K7">CQC-WFF</a> 
 
<b>by </b><i><a class="ref" href="cqc_lang.html#T18">CQC_LANG:18</a></i>;<br/>
<a NAME="E5:22_1_1"/><b>then </b><i><font color="Green">E27</font></i>: 
 <a href="qc_lang1.html#K12">'not'</a> <font color="Maroon">c<sub>3</sub></font> is    <a href="subset_1.html#M2">Element</a> of  <a href="cqc_lang.html#K7">CQC-WFF</a> 
 
<b>by </b><i><a class="ref" href="cqc_lang.html#T23">CQC_LANG:23</a></i>;<br/>
<b>take </b>
<font color="Maroon">c<sub>3</sub></font>
;<br/>

<b>thus </b><a NAME="E6:22_1_1"/>
( <font color="Maroon">c<sub>3</sub></font> is    <a href="subset_1.html#M2">Element</a> of  <a href="cqc_lang.html#K7">CQC-WFF</a>  &amp; ex <font color="Olive">b<sub>1</sub></font> being  <a href="qc_lang1.html#NM3">bound_QC-variable</a> st <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="cqc_lang.html#K16">Ex</a> <font color="Olive">b<sub>1</sub></font>,<font color="Maroon">c<sub>3</sub></font> )
 <b>by </b><i><a class="txt" href="goedelcp.html#E2:22_1_1"><i><font color="Green">E26</font></i></a>, <a class="txt" href="goedelcp.html#E5:22_1_1"><i><font color="Green">E27</font></i></a>, <a class="ref" href="cqc_lang.html#T18">CQC_LANG:18</a></i>;<br/>


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