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<b>let </b><font color="Maroon">p</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="intpro_1.html#K1" target="_self">MC-wff</a> ;<br/><b>let </b><font color="Maroon">q</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="intpro_1.html#K1" target="_self">MC-wff</a> ;<br/>



<div><b>hereby </b>
<div class="add"><b>assume </b><a NAME="E1:61_1"/>
<font color="Maroon">p</font> <a href="intpro_1.html#K4" target="_self">'&amp;'</a> <font color="Maroon">q</font> <a href="hidden.html#R2">in</a>  <a href="intpro_1.html#K8" target="_self">IPC-Taut</a> 
 ;<br/><a NAME="E2:61_1"/><b>then </b>
( <font color="Maroon">p</font> <a href="hidden.html#R2">in</a>  <a href="intpro_1.html#K8" target="_self">IPC-Taut</a>  &amp; <font color="Maroon">q</font> <a href="hidden.html#R2">in</a>  <a href="intpro_1.html#K8" target="_self">IPC-Taut</a>  )
 <b>by </b><i/>;<br/><b>hence </b><a NAME="E3:61_1"/>
<font color="Maroon">q</font> <a href="intpro_1.html#K4" target="_self">'&amp;'</a> <font color="Maroon">p</font> <a href="hidden.html#R2">in</a>  <a href="intpro_1.html#K8" target="_self">IPC-Taut</a> 
 <b>by </b><i/>;<br/></div>
<b>end;</b></div>

<b>assume </b><a NAME="E2:61"/>
<font color="Maroon">q</font> <a href="intpro_1.html#K4" target="_self">'&amp;'</a> <font color="Maroon">p</font> <a href="hidden.html#R2">in</a>  <a href="intpro_1.html#K8" target="_self">IPC-Taut</a> 
 ;<br/>

<a NAME="E3:61"/><b>then </b>
( <font color="Maroon">q</font> <a href="hidden.html#R2">in</a>  <a href="intpro_1.html#K8" target="_self">IPC-Taut</a>  &amp; <font color="Maroon">p</font> <a href="hidden.html#R2">in</a>  <a href="intpro_1.html#K8" target="_self">IPC-Taut</a>  )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E4:61"/>
<font color="Maroon">p</font> <a href="intpro_1.html#K4" target="_self">'&amp;'</a> <font color="Maroon">q</font> <a href="hidden.html#R2">in</a>  <a href="intpro_1.html#K8" target="_self">IPC-Taut</a> 
 <b>by </b><i/>;<br/>


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