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<b>let </b><font color="Maroon" title="c1">X</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a> ;<br/><b>let </b><font color="Maroon" title="c2">p</font>, <font color="Maroon" title="c3">q</font> be    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a> ;<br/>





<b>assume </b><a NAME="E1:132"/><i><font color="Green" title="E98">A1</font></i>: 
( <font color="Maroon" title="c2">p</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="intpro_1.html#K13" title="INTPRO_1:func.13">CnS4</a> <font color="Maroon" title="c1">X</font> &amp; <font color="Maroon" title="c2">p</font> <a href="intpro_1.html#K3" title="INTPRO_1:func.3">=&gt;</a> <font color="Maroon" title="c3">q</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="intpro_1.html#K13" title="INTPRO_1:func.13">CnS4</a> <font color="Maroon" title="c1">X</font> )
 ;<br/>

<a NAME="E2:132"/>
for <font color="Olive" title="b1">T</font> being  <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a>   st <font color="Olive" title="b1">T</font> is <a href="intpro_1.html#V10" title="INTPRO_1:attr.10">S4_theory</a> &amp; <font color="Maroon" title="c1">X</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Olive" title="b1">T</font> holds <br/><font color="Maroon" title="c3">q</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Olive" title="b1">T</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="132_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c4">T</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a> ;<br/>

<b>assume </b><a NAME="E1:132_1"/><i><font color="Green" title="E99">A2</font></i>: 
( <font color="Maroon" title="c4">T</font> is <a href="intpro_1.html#V10" title="INTPRO_1:attr.10">S4_theory</a> &amp; <font color="Maroon" title="c1">X</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c4">T</font> )
 ;<br/>

<a NAME="E2:132_1"/><b>then </b>
( <font color="Maroon" title="c2">p</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c4">T</font> &amp; <font color="Maroon" title="c2">p</font> <a href="intpro_1.html#K3" title="INTPRO_1:func.3">=&gt;</a> <font color="Maroon" title="c3">q</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c4">T</font> )
 
<b>by </b><i><a class="txt" href="intpro_1.html#E1:132"><i><font color="Green" title="E98">A1</font></i></a>, <a class="ref" href="intpro_1.html#D23" target="_self" title="INTPRO_1:def.23">Def23</a></i>;<br/>
<b>hence </b><a NAME="E3:132_1"/>
<font color="Maroon" title="c3">q</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c4">T</font>
 <b>by </b><i><a class="txt" href="intpro_1.html#E1:132_1"><i><font color="Green" title="E99">A2</font></i></a>, <a class="ref" href="intpro_1.html#D22" target="_self" title="INTPRO_1:def.22">Def22</a></i>;<br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E3:132"/>
<font color="Maroon" title="c3">q</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="intpro_1.html#K13" title="INTPRO_1:func.13">CnS4</a> <font color="Maroon" title="c1">X</font>
 <b>by </b><i><a class="ref" href="intpro_1.html#D23" target="_self" title="INTPRO_1:def.23">Def23</a></i>;<br/>


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