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<b>let </b><font color="Maroon">H</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">k</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a> ;<br/><b>let </b><font color="Maroon">P</font> be   <a href="qc_lang1.html#NM6">QC-pred_symbol</a> of <font color="Maroon">k</font>;<br/><b>let </b><font color="Maroon">V</font> be    <a href="qc_lang1.html#M1">QC-variable_list</a> of <font color="Maroon">k</font>;<br/>







<b>assume </b><a NAME="E1:40"/><i><font color="Green">E28</font></i>: 
<font color="Maroon">H</font> <a href="qc_lang2.html#R1" target="_self">is_immediate_constituent_of</a> <font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font>
 ;<br/>

<a NAME="E2:40"/>
( <font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font> is <a href="qc_lang1.html#V2">atomic</a> &amp;  <a href="qc_lang1.html#K12">'not'</a> <font color="Maroon">H</font> is <a href="qc_lang1.html#V3">negative</a> )
 
<b>by </b><i><a class="ref" href="qc_lang1.html#D17">QC_LANG1:def 17</a>, <a class="ref" href="qc_lang1.html#D18">QC_LANG1:def 18</a></i>;<br/>
<a NAME="E3:40"/><b>then </b><i><font color="Green">E29</font></i>: 
( <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="qc_lang1.html#K10">@</a> <span class="p3">(<span class="default"><font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font></span>)</span></span>)</span> <a href="funct_1.html#K1">.</a> 1</span>)</span> <a href="mcart_1.html#K1">`1</a>  <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 0 &amp; <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="qc_lang1.html#K10">@</a> <span class="p3">(<span class="default"><font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font></span>)</span></span>)</span> <a href="funct_1.html#K1">.</a> 1</span>)</span> <a href="mcart_1.html#K1">`1</a>  <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 1 &amp; <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="qc_lang1.html#K10">@</a> <span class="p3">(<span class="default"><font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font></span>)</span></span>)</span> <a href="funct_1.html#K1">.</a> 1</span>)</span> <a href="mcart_1.html#K1">`1</a>  <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 2 &amp; <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="qc_lang1.html#K10">@</a> <span class="p3">(<span class="default"><font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font></span>)</span></span>)</span> <a href="funct_1.html#K1">.</a> 1</span>)</span> <a href="mcart_1.html#K1">`1</a>  <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 3 &amp; <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="qc_lang1.html#K10">@</a> <span class="p3">(<span class="default"><a href="qc_lang1.html#K12">'not'</a> <font color="Maroon">H</font></span>)</span></span>)</span> <a href="funct_1.html#K1">.</a> 1</span>)</span> <a href="mcart_1.html#K1">`1</a>  <a href="hidden.html#R1">=</a> 1 )
 
<b>by </b><i><a class="ref" href="qc_lang1.html#T49">QC_LANG1:49</a>, <a class="ref" href="qc_lang1.html#T50">QC_LANG1:50</a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="40_1"><b>now </b></a><div class="add"><b>given </b><font color="Maroon">H1</font> being    <a href="subset_1.html#M1">Element</a> of  <a href="qc_lang1.html#K8">QC-WFF</a> <b> such that </b><a NAME="E1:40_1"/><i><font color="Green">E30</font></i>: 
( <font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font> <a href="hidden.html#R1">=</a> <font color="Maroon">H</font> <a href="qc_lang1.html#K13">'&amp;'</a> <font color="Maroon">H1</font> or <font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font> <a href="hidden.html#R1">=</a> <font color="Maroon">H1</font> <a href="qc_lang1.html#K13">'&amp;'</a> <font color="Maroon">H</font> )
 ;<br/><a NAME="E2:40_1"/>
( <font color="Maroon">H</font> <a href="qc_lang1.html#K13">'&amp;'</a> <font color="Maroon">H1</font> is <a href="qc_lang1.html#V4">conjunctive</a> &amp; <font color="Maroon">H1</font> <a href="qc_lang1.html#K13">'&amp;'</a> <font color="Maroon">H</font> is <a href="qc_lang1.html#V4">conjunctive</a> )
 <b>by </b><i><a class="ref" href="qc_lang1.html#D19">QC_LANG1:def 19</a></i>;<br/><b>hence </b><a NAME="E3:40_1"/>
contradiction
 <b>by </b><i>, <a class="ref" href="qc_lang2.html#T1" target="_self">Th1</a>, <a class="ref" href="qc_lang1.html#T49">QC_LANG1:49</a></i>;<br/></div><b>end;</b></div>
<b>then consider </b><font color="Maroon">z</font> being   <a href="qc_lang1.html#NM3">bound_QC-variable</a><b> such that </b><br/><a NAME="E6:40"/><i><font color="Green">E34</font></i>: 
<font color="Maroon">P</font> <a href="qc_lang1.html#K9">!</a> <font color="Maroon">V</font> <a href="hidden.html#R1">=</a>  <a href="qc_lang1.html#K14">All</a> <font color="Maroon">z</font>,<font color="Maroon">H</font>
 <b>by </b><i>, , </i>;<br/>
<a NAME="E7:40"/>
 <a href="qc_lang1.html#K14">All</a> <font color="Maroon">z</font>,<font color="Maroon">H</font> is <a href="qc_lang1.html#V5">universal</a>
 
<b>by </b><i><a class="ref" href="qc_lang1.html#D20">QC_LANG1:def 20</a></i>;<br/>
<b>hence </b><a NAME="E8:40"/>
contradiction
 <b>by </b><i>, <a class="ref" href="qc_lang2.html#T1" target="_self">Th1</a>, <a class="ref" href="qc_lang1.html#T49">QC_LANG1:49</a></i>;<br/>


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