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<b>let </b><font color="Maroon">B</font> be    <a href="subset_1.html#M1">Element</a> of <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><a href="substut1.html#K16">QC-Sub-WFF</a> ,<a href="qc_lang1.html#K2">bound_QC-variables</a> </span><a href="zfmisc_1.html#K2">:]</a></span>;<br/><b>let </b><font color="Maroon">SQ</font> be    <a href="substut1.html#M1">second_Q_comp</a> of <font color="Maroon">B</font>;<br/>



<b>assume </b><a NAME="E1:34"/>
<font color="Maroon">B</font> is <a href="substut1.html#V3">quantifiable</a>
 ;<br/>

<a NAME="E2:34"/><b>then </b>
 <a href="substut1.html#K24">Sub_All</a> <font color="Maroon">B</font>,<font color="Maroon">SQ</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K1">[</a><span class="default"><span class="p2">(<span class="default"><a href="qc_lang1.html#K14">All</a> <span class="p3">(<span class="default"><font color="Maroon">B</font> <a href="substut1.html#K23">`2</a> </span>)</span>,<span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">B</font> <a href="substut1.html#K22">`1</a> </span>)</span> <a href="substut1.html#K18">`1</a> </span>)</span></span>)</span>,<font color="Maroon">SQ</font></span><a href="domain_1.html#K1">]</a></span>
 
<b>by </b><i><a class="ref" href="substut1.html#D24">SUBSTUT1:def 24</a></i>;<br/>
<b>hence </b><a NAME="E3:34"/>
( <span class="p1">(<span class="default"><a href="substut1.html#K24">Sub_All</a> <font color="Maroon">B</font>,<font color="Maroon">SQ</font></span>)</span> <a href="substut1.html#K18">`1</a>  <a href="hidden.html#R1">=</a>  <a href="qc_lang1.html#K14">All</a> <span class="p1">(<span class="default"><font color="Maroon">B</font> <a href="substut1.html#K23">`2</a> </span>)</span>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">B</font> <a href="substut1.html#K22">`1</a> </span>)</span> <a href="substut1.html#K18">`1</a> </span>)</span> &amp; <span class="p1">(<span class="default"><a href="substut1.html#K24">Sub_All</a> <font color="Maroon">B</font>,<font color="Maroon">SQ</font></span>)</span> <a href="substut1.html#K19">`2</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">SQ</font> )
 <b>by </b><i><a class="ref" href="mcart_1.html#T7">MCART_1:7</a></i>;<br/>


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