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

<a href="margrel1.html#K8">TRUE</a>  <a href="binari_5.html#K5" target="_self">'xnor'</a> <font color="Maroon">c<sub>1</sub></font> = 
 <a href="margrel1.html#K9">'not'</a> <span class="p1">(<span class="default"><a href="margrel1.html#K8">TRUE</a>  <a href="binarith.html#K2">'xor'</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>

<br/>.= 
 <a href="margrel1.html#K9">'not'</a> <span class="p1">(<span class="default"><a href="margrel1.html#K9">'not'</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="binarith.html#T13">BINARITH:13</a></i>
;<br/>
<b>hence </b><a NAME="E2:16"/>
<a href="margrel1.html#K8">TRUE</a>  <a href="binari_5.html#K5" target="_self">'xnor'</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>1</sub></font>
 ;<br/>


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