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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="margrel1.html#V2" target="_self">boolean</a>  <a href="hidden.html#M1">set</a> ;<br/>

<a NAME="E1:42"/><i><font color="Green">E15</font></i>: 
( <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="margrel1.html#K8" target="_self">TRUE</a>  implies <a href="margrel1.html#K8" target="_self">TRUE</a>  <a href="margrel1.html#K10" target="_self">'&amp;'</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>1</sub></font> )
 
<b>by </b><i><a class="ref" href="margrel1.html#T45" target="_self">Th45</a></i>;<br/>
<a NAME="E2:42"/>
( <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="margrel1.html#K7" target="_self">FALSE</a>  implies <a href="margrel1.html#K8" target="_self">TRUE</a>  <a href="margrel1.html#K10" target="_self">'&amp;'</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>1</sub></font> )
 
<b>by </b><i><a class="ref" href="margrel1.html#T45" target="_self">Th45</a></i>;<br/>
<b>hence </b><a NAME="E3:42"/>
<a href="margrel1.html#K8" target="_self">TRUE</a>  <a href="margrel1.html#K10" target="_self">'&amp;'</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="txt" href="margrel1.html#E1:42"><i><font color="Green">E15</font></i></a>, <a class="ref" href="margrel1.html#T39" target="_self">Th39</a></i>;<br/>


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