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<a NAME="E1:36_2_1"/>
( ( <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="margrel1.html#K8" target="_self">TRUE</a>  &amp; <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="margrel1.html#K8" target="_self">TRUE</a>  ) or  not <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="margrel1.html#K8" target="_self">TRUE</a>  or  not <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="margrel1.html#K8" target="_self">TRUE</a>  )
 
;<br/>
<b>hence </b><a NAME="E2:36_2_1"/>
<font color="Maroon">c<sub>1</sub></font> <a href="margrel1.html#K10" target="_self">'&amp;'</a> <font color="Maroon">c<sub>2</sub></font> is <a href="margrel1.html#V2" target="_self">boolean</a>
 <b>by </b><i><a class="ref" href="margrel1.html#D17" target="_self">Def17</a></i>;<br/>


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