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<b>consider </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> being  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/>
<a NAME="E2:3_2_1"/>
not  <a href="conlat_1.html#G1" target="_self">2-sorted</a>(# <font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>2</sub></font> #) is <a href="conlat_1.html#V3" target="_self">quasi-empty</a>
 
<b>by </b><i><a class="ref" href="conlat_1.html#D2" target="_self">Def2</a></i>;<br/>
<b>hence </b><a NAME="E3:3_2_1"/>
ex <font color="Olive">b<sub>1</sub></font> being   <a href="conlat_1.html#L1" target="_self">2-sorted</a>  st <br/>( <font color="Olive">b<sub>1</sub></font> is <a href="conlat_1.html#V1" target="_self">strict</a> &amp; not <font color="Olive">b<sub>1</sub></font> is <a href="conlat_1.html#V3" target="_self">quasi-empty</a> )
 ;<br/>


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