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<span class="kw">let </span><font color="Maroon" title="c2">x1</font>, <font color="Maroon" title="c3">x2</font> be   <a href="qc_lang1.html#NM3" title="QC_LANG1:NM.3">bound_QC-variable</a>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> (  ex <font color="Olive" title="b1">B</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <span class="p1"><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">[:</a><span class="default"><a href="substut1.html#K16" title="SUBSTUT1:func.16">QC-Sub-WFF</a>,<a href="qc_lang1.html#K2" title="QC_LANG1:func.2">bound_QC-variables</a></span><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">:]</a></span> ex <font color="Olive" title="b2">SQ</font> being    <a href="substut1.html#M1" title="SUBSTUT1:mode.1">second_Q_comp</a> of <font color="Olive" title="b1">B</font> st <br/>( <font color="Maroon" title="c1">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="substut1.html#K24" title="SUBSTUT1:func.24">Sub_All</a> (<font color="Olive" title="b1">B</font>,<font color="Olive" title="b2">SQ</font>) &amp; <font color="Olive" title="b1">B</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">x1</font> &amp; <font color="Olive" title="b1">B</font> is  <a href="substut1.html#V3" title="SUBSTUT1:attr.3">quantifiable</a>  ) &amp;  ex <font color="Olive" title="b1">B</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <span class="p1"><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">[:</a><span class="default"><a href="substut1.html#K16" title="SUBSTUT1:func.16">QC-Sub-WFF</a>,<a href="qc_lang1.html#K2" title="QC_LANG1:func.2">bound_QC-variables</a></span><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">:]</a></span> ex <font color="Olive" title="b2">SQ</font> being    <a href="substut1.html#M1" title="SUBSTUT1:mode.1">second_Q_comp</a> of <font color="Olive" title="b1">B</font> st <br/>( <font color="Maroon" title="c1">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="substut1.html#K24" title="SUBSTUT1:func.24">Sub_All</a> (<font color="Olive" title="b1">B</font>,<font color="Olive" title="b2">SQ</font>) &amp; <font color="Olive" title="b1">B</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">x2</font> &amp; <font color="Olive" title="b1">B</font> is  <a href="substut1.html#V3" title="SUBSTUT1:attr.3">quantifiable</a>  ) implies <font color="Maroon" title="c2">x1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">x2</font> )</span><br/>



<span class="kw">assume </span><span class="kw">that </span><br/><a NAME="E1:56_1_2"/><span class="lab"><font color="Green" title="E32">A3</font></span>: 
 ex <font color="Olive" title="b1">B</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <span class="p1"><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">[:</a><span class="default"><a href="substut1.html#K16" title="SUBSTUT1:func.16">QC-Sub-WFF</a>,<a href="qc_lang1.html#K2" title="QC_LANG1:func.2">bound_QC-variables</a></span><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">:]</a></span> ex <font color="Olive" title="b2">SQ</font> being    <a href="substut1.html#M1" title="SUBSTUT1:mode.1">second_Q_comp</a> of <font color="Olive" title="b1">B</font> st <br/>( <font color="Maroon" title="c1">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="substut1.html#K24" title="SUBSTUT1:func.24">Sub_All</a> (<font color="Olive" title="b1">B</font>,<font color="Olive" title="b2">SQ</font>) &amp; <font color="Olive" title="b1">B</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">x1</font> &amp; <font color="Olive" title="b1">B</font> is  <a href="substut1.html#V3" title="SUBSTUT1:attr.3">quantifiable</a>  )
 <span class="kw">and </span><br/><a NAME="E2:56_1_2"/><span class="lab"><font color="Green" title="E33">A4</font></span>: 
 ex <font color="Olive" title="b1">B</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <span class="p1"><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">[:</a><span class="default"><a href="substut1.html#K16" title="SUBSTUT1:func.16">QC-Sub-WFF</a>,<a href="qc_lang1.html#K2" title="QC_LANG1:func.2">bound_QC-variables</a></span><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">:]</a></span> ex <font color="Olive" title="b2">SQ</font> being    <a href="substut1.html#M1" title="SUBSTUT1:mode.1">second_Q_comp</a> of <font color="Olive" title="b1">B</font> st <br/>( <font color="Maroon" title="c1">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="substut1.html#K24" title="SUBSTUT1:func.24">Sub_All</a> (<font color="Olive" title="b1">B</font>,<font color="Olive" title="b2">SQ</font>) &amp; <font color="Olive" title="b1">B</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">x2</font> &amp; <font color="Olive" title="b1">B</font> is  <a href="substut1.html#V3" title="SUBSTUT1:attr.3">quantifiable</a>  )
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> <font color="Maroon" title="c2">x1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">x2</font></span><br/>

<span class="kw">consider </span><font color="Maroon" title="c4">B1</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <span class="p1"><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">[:</a><span class="default"><a href="substut1.html#K16" title="SUBSTUT1:func.16">QC-Sub-WFF</a>,<a href="qc_lang1.html#K2" title="QC_LANG1:func.2">bound_QC-variables</a></span><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">:]</a></span>, <font color="Maroon" title="c5">SQ1</font> being    <a href="substut1.html#M1" title="SUBSTUT1:mode.1">second_Q_comp</a> of <font color="Maroon" title="c4">B1</font><span class="kw"> such that </span><br/><a NAME="E4:56_1_2"/><span class="lab"><font color="Green" title="E34">A5</font></span>: 
<font color="Maroon" title="c1">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="substut1.html#K24" title="SUBSTUT1:func.24">Sub_All</a> (<font color="Maroon" title="c4">B1</font>,<font color="Maroon" title="c5">SQ1</font>)
 <span class="kw">and </span><br/><a NAME="E5:56_1_2"/><span class="lab"><font color="Green" title="E35">A6</font></span>: 
<font color="Maroon" title="c4">B1</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">x1</font>
 <span class="kw">and </span><br/><a NAME="E6:56_1_2"/><span class="lab"><font color="Green" title="E36">A7</font></span>: 
<font color="Maroon" title="c4">B1</font> is  <a href="substut1.html#V3" title="SUBSTUT1:attr.3">quantifiable</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:56_1_2"><span class="lab"><font color="Green" title="E32">A3</font></span></a></span>;<br/>
<span class="kw">consider </span><font color="Maroon" title="c6">B2</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <span class="p1"><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">[:</a><span class="default"><a href="substut1.html#K16" title="SUBSTUT1:func.16">QC-Sub-WFF</a>,<a href="qc_lang1.html#K2" title="QC_LANG1:func.2">bound_QC-variables</a></span><a href="zfmisc_1.html#K2" title="ZFMISC_1:func.2">:]</a></span>, <font color="Maroon" title="c7">SQ2</font> being    <a href="substut1.html#M1" title="SUBSTUT1:mode.1">second_Q_comp</a> of <font color="Maroon" title="c6">B2</font><span class="kw"> such that </span><br/><a NAME="E8:56_1_2"/><span class="lab"><font color="Green" title="E37">A8</font></span>: 
<font color="Maroon" title="c1">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="substut1.html#K24" title="SUBSTUT1:func.24">Sub_All</a> (<font color="Maroon" title="c6">B2</font>,<font color="Maroon" title="c7">SQ2</font>)
 <span class="kw">and </span><br/><a NAME="E9:56_1_2"/><span class="lab"><font color="Green" title="E38">A9</font></span>: 
<font color="Maroon" title="c6">B2</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">x2</font>
 <span class="kw">and </span><br/><a NAME="E10:56_1_2"/><span class="lab"><font color="Green" title="E39">A10</font></span>: 
<font color="Maroon" title="c6">B2</font> is  <a href="substut1.html#V3" title="SUBSTUT1:attr.3">quantifiable</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E2:56_1_2"><span class="lab"><font color="Green" title="E33">A4</font></span></a></span>;<br/>
<a NAME="E11:56_1_2"/><span class="lab"><font color="Green" title="E40">A11</font></span>: 
<span class="p1"><a href="domain_1.html#K1" title="DOMAIN_1:func.1">[</a><span class="default"><span class="p2">(<span class="default"><a href="qc_lang1.html#K14" title="QC_LANG1:func.14">All</a> (<span class="p3">(<span class="default"><font color="Maroon" title="c6">B2</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a></span>)</span>,<span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon" title="c6">B2</font> <a href="substut1.html#K22" title="SUBSTUT1:func.22">`1</a></span>)</span> <a href="substut1.html#K18" title="SUBSTUT1:func.18">`1</a></span>)</span>)</span>)</span>,<font color="Maroon" title="c7">SQ2</font></span><a href="domain_1.html#K1" title="DOMAIN_1:func.1">]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c1">A</font>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E8:56_1_2"><span class="lab"><font color="Green" title="E37">A8</font></span></a>, <a class="txt" href="#E10:56_1_2"><span class="lab"><font color="Green" title="E39">A10</font></span></a>, <a class="ref" href="substut1.html#D24" target="_self" title="SUBSTUT1:def.24">Def24</a></span>;<br/>
<a NAME="E12:56_1_2"/>
<span class="p1"><a href="domain_1.html#K1" title="DOMAIN_1:func.1">[</a><span class="default"><span class="p2">(<span class="default"><a href="qc_lang1.html#K14" title="QC_LANG1:func.14">All</a> (<span class="p3">(<span class="default"><font color="Maroon" title="c4">B1</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a></span>)</span>,<span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon" title="c4">B1</font> <a href="substut1.html#K22" title="SUBSTUT1:func.22">`1</a></span>)</span> <a href="substut1.html#K18" title="SUBSTUT1:func.18">`1</a></span>)</span>)</span>)</span>,<font color="Maroon" title="c5">SQ1</font></span><a href="domain_1.html#K1" title="DOMAIN_1:func.1">]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c1">A</font>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E4:56_1_2"><span class="lab"><font color="Green" title="E34">A5</font></span></a>, <a class="txt" href="#E6:56_1_2"><span class="lab"><font color="Green" title="E36">A7</font></span></a>, <a class="ref" href="substut1.html#D24" target="_self" title="SUBSTUT1:def.24">Def24</a></span>;<br/>
<a NAME="E13:56_1_2"/><span class="kw">then </span>
 <a href="qc_lang1.html#K14" title="QC_LANG1:func.14">All</a> (<span class="p1">(<span class="default"><font color="Maroon" title="c4">B1</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a></span>)</span>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c4">B1</font> <a href="substut1.html#K22" title="SUBSTUT1:func.22">`1</a></span>)</span> <a href="substut1.html#K18" title="SUBSTUT1:func.18">`1</a></span>)</span>) <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="qc_lang1.html#K14" title="QC_LANG1:func.14">All</a> (<span class="p1">(<span class="default"><font color="Maroon" title="c6">B2</font> <a href="substut1.html#K23" title="SUBSTUT1:func.23">`2</a></span>)</span>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c6">B2</font> <a href="substut1.html#K22" title="SUBSTUT1:func.22">`1</a></span>)</span> <a href="substut1.html#K18" title="SUBSTUT1:func.18">`1</a></span>)</span>)
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E11:56_1_2"><span class="lab"><font color="Green" title="E40">A11</font></span></a>, <a class="ref" href="zfmisc_1.html#T27" title="ZFMISC_1:th.27">ZFMISC_1:27</a></span>;<br/>
<span class="kw">hence </span><a NAME="E14:56_1_2"/>
<font color="Maroon" title="c2">x1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">x2</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:56_1_2"><span class="lab"><font color="Green" title="E35">A6</font></span></a>, <a class="txt" href="#E9:56_1_2"><span class="lab"><font color="Green" title="E38">A9</font></span></a>, <a class="ref" href="qc_lang2.html#T5" title="QC_LANG2:th.5">QC_LANG2:5</a></span>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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