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<b>let </b><font color="Maroon">L</font> be  <a href="waybel_1.html#V11">Boolean</a> <a href="waybel_0.html#NM8">LATTICE</a>;<br/><b>let </b><font color="Maroon">x</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>;<br/>



<a NAME="E1:48"/>
for <font color="Olive">x</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> holds   <a href="waybel_1.html#K7">'not'</a> <span class="p1">(<span class="default"><a href="waybel_1.html#K7">'not'</a> <font color="Olive">x</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Olive">x</font>
 
<b>by </b><i><a class="ref" href="waybel_1.html#T90">WAYBEL_1:90</a></i>;<br/>
<a NAME="E2:48"/><b>then </b>
 <a href="waybel_1.html#K7">'not'</a> <font color="Maroon">x</font> <a href="waybel_1.html#R6">is_a_complement_of</a> <font color="Maroon">x</font>
 
<b>by </b><i><a class="ref" href="waybel_1.html#T89">WAYBEL_1:89</a></i>;<br/>
<a NAME="E3:48"/><b>then </b>
<span class="p1">(<span class="default"><a href="waybel_1.html#K7">'not'</a> <font color="Maroon">x</font></span>)</span> <a href="lattice3.html#K8">~</a>  <a href="waybel_1.html#R6">is_a_complement_of</a> <font color="Maroon">x</font> <a href="lattice3.html#K8">~</a> 
 
<b>by </b><i/>;<br/>
<a NAME="E4:48"/><b>then </b>
 <a href="waybel_1.html#K7">'not'</a> <span class="p1">(<span class="default"><font color="Maroon">x</font> <a href="lattice3.html#K8">~</a> </span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="waybel_1.html#K7">'not'</a> <font color="Maroon">x</font></span>)</span> <a href="lattice3.html#K8">~</a> 
 
<b>by </b><i><a class="ref" href="yellow_5.html#T11">YELLOW_5:11</a></i>;<br/>
<b>hence </b><a NAME="E5:48"/>
 <a href="waybel_1.html#K7">'not'</a> <span class="p1">(<span class="default"><font color="Maroon">x</font> <a href="lattice3.html#K8">~</a> </span>)</span> <a href="hidden.html#R1">=</a>  <a href="waybel_1.html#K7">'not'</a> <font color="Maroon">x</font>
 ;<br/>


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