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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>assume </b><a NAME="E1:25"/><i><font color="Green">E43</font></i>: 
for <font color="Olive">Sub</font> being  <a href="substut1.html#NM1">CQC_Substitution</a> holds   <a href="cqc_sim1.html#K6">QuantNbr</a> <font color="Maroon">p</font> <a href="hidden.html#R1">=</a>  <a href="cqc_sim1.html#K6">QuantNbr</a> <span class="p1">(<span class="default"><a href="substut1.html#K39">CQC_Sub</a> <span class="p2"><a href="substut2.html#K2" target="_self">[</a><span class="default"><font color="Maroon">p</font>,<font color="Olive">Sub</font></span><a href="substut2.html#K2" target="_self">]</a></span></span>)</span>
 ;<br/>

<b>let </b><font color="Maroon">Sub</font> be   <a href="substut1.html#NM1">CQC_Substitution</a>;<br/>

<b>set </b><font color="Maroon">S</font> = <span class="p1"><a href="substut2.html#K2" target="_self">[</a><span class="default"><span class="p2">(<span class="default"><a href="cqc_lang.html#K10">'not'</a> <font color="Maroon">p</font></span>)</span>,<font color="Maroon">Sub</font></span><a href="substut2.html#K2" target="_self">]</a></span>;<br/>
<a NAME="E2:25"/>
<span class="p1"><a href="substut2.html#K2" target="_self">[</a><span class="default"><span class="p2">(<span class="default"><a href="cqc_lang.html#K10">'not'</a> <font color="Maroon">p</font></span>)</span>,<font color="Maroon">Sub</font></span><a href="substut2.html#K2" target="_self">]</a></span> <a href="hidden.html#R1">=</a>  <a href="sublemma.html#K6">Sub_not</a> <span class="p1"><a href="substut2.html#K2" target="_self">[</a><span class="default"><font color="Maroon">p</font>,<font color="Maroon">Sub</font></span><a href="substut2.html#K2" target="_self">]</a></span>
 
<b>by </b><i/>;<br/>
<b>then </b> <a href="cqc_sim1.html#K6">QuantNbr</a> <span class="p1">(<span class="default"><a href="substut1.html#K39">CQC_Sub</a> <span class="p2"><a href="substut2.html#K2" target="_self">[</a><span class="default"><span class="p3">(<span class="default"><a href="cqc_lang.html#K10">'not'</a> <font color="Maroon">p</font></span>)</span>,<font color="Maroon">Sub</font></span><a href="substut2.html#K2" target="_self">]</a></span></span>)</span> = 
 <a href="cqc_sim1.html#K6">QuantNbr</a> <span class="p1">(<span class="default"><a href="cqc_lang.html#K10">'not'</a> <span class="p2">(<span class="default"><a href="substut1.html#K39">CQC_Sub</a> <span class="p3"><a href="substut2.html#K2" target="_self">[</a><span class="default"><font color="Maroon">p</font>,<font color="Maroon">Sub</font></span><a href="substut2.html#K2" target="_self">]</a></span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="substut1.html#T29">SUBSTUT1:29</a></i>
<br/>.= 
 <a href="cqc_sim1.html#K6">QuantNbr</a> <span class="p1">(<span class="default"><a href="substut1.html#K39">CQC_Sub</a> <span class="p2"><a href="substut2.html#K2" target="_self">[</a><span class="default"><font color="Maroon">p</font>,<font color="Maroon">Sub</font></span><a href="substut2.html#K2" target="_self">]</a></span></span>)</span>
<b>by </b><i><a class="ref" href="cqc_sim1.html#T16">CQC_SIM1:16</a></i>
<br/>.= 
 <a href="cqc_sim1.html#K6">QuantNbr</a> <font color="Maroon">p</font>
<b>by </b><i/>
;<br/>
<b>hence </b><a NAME="E4:25"/>
 <a href="cqc_sim1.html#K6">QuantNbr</a> <span class="p1">(<span class="default"><a href="cqc_lang.html#K10">'not'</a> <font color="Maroon">p</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="cqc_sim1.html#K6">QuantNbr</a> <span class="p1">(<span class="default"><a href="substut1.html#K39">CQC_Sub</a> <span class="p2"><a href="substut2.html#K2" target="_self">[</a><span class="default"><span class="p3">(<span class="default"><a href="cqc_lang.html#K10">'not'</a> <font color="Maroon">p</font></span>)</span>,<font color="Maroon">Sub</font></span><a href="substut2.html#K2" target="_self">]</a></span></span>)</span>
 <b>by </b><i><a class="ref" href="cqc_sim1.html#T16">CQC_SIM1:16</a></i>;<br/>


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