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<b>let </b><font color="Maroon" title="c1">B</font> be    <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>;<br/><b>let </b><font color="Maroon" title="c2">SQ</font> be    <a href="substut1.html#M1" title="SUBSTUT1:mode.1">second_Q_comp</a> of <font color="Maroon" title="c1">B</font>;<br/>



<b>assume </b><a NAME="E1:60"/><i><font color="Green" title="E34">A1</font></i>: 
<font color="Maroon" title="c1">B</font> is <a href="substut1.html#V3" title="SUBSTUT1:attr.3">quantifiable</a>
 ;<br/>

<b>take </b>
<font color="Maroon" title="c1">B</font>
; <i><font color="Red">:: according to </font></i><a class="ref" href="substut1.html#D28" target="_self" title="SUBSTUT1:def.28">SUBSTUT1:def 28</a><br/>

<b>take </b>
<font color="Maroon" title="c2">SQ</font>
;<br/>

<b>thus </b><a NAME="E2:60"/>
(  <a href="substut1.html#K24" title="SUBSTUT1:func.24">Sub_All</a> <font color="Maroon" title="c1">B</font>,<font color="Maroon" title="c2">SQ</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="c1">B</font>,<font color="Maroon" title="c2">SQ</font> &amp; <font color="Maroon" title="c1">B</font> is <a href="substut1.html#V3" title="SUBSTUT1:attr.3">quantifiable</a> )
 <b>by </b><i><a class="txt" href="substut1.html#E1:60"><i><font color="Green" title="E34">A1</font></i></a></i>;<br/>


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