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<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> be    <a href="hidden.html#M1">set</a> ;<br/>



<b>assume </b><a NAME="E1:96"/>
<font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R2">in</a> <font color="Maroon">c<sub>1</sub></font>
 ;<br/>

<a NAME="E2:96"/><b>then </b>
 <a href="setfam_1.html#K1">meet</a> <font color="Maroon">c<sub>1</sub></font> <a href="tarski.html#R1">c=</a> <font color="Maroon">c<sub>2</sub></font>
 
<b>by </b><i><a class="ref" href="setfam_1.html#T4">SETFAM_1:4</a></i>;<br/>
<b>hence </b><a NAME="E3:96"/>
(  not <font color="Maroon">c<sub>2</sub></font> is <a href="membered.html#V3" target="_self">rational-membered</a> or  <a href="setfam_1.html#K1">meet</a> <font color="Maroon">c<sub>1</sub></font> is <a href="membered.html#V3" target="_self">rational-membered</a> )
 <b>by </b><i><a class="ref" href="membered.html#T18" target="_self">Th18</a></i>;<br/>


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