<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">F</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">X</font> be    <a href="hidden.html#M1">set</a> ;<br/>



<b>assume </b><a NAME="E1:98"/>
<font color="Maroon">X</font> <a href="hidden.html#R2">in</a> <font color="Maroon">F</font>
 ;<br/>

<a NAME="E2:98"/><b>then </b>
 <a href="setfam_1.html#K1">meet</a> <font color="Maroon">F</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">X</font>
 
<b>by </b><i><a class="ref" href="setfam_1.html#T4">SETFAM_1:4</a></i>;<br/>
<b>hence </b><a NAME="E3:98"/>
(  not <font color="Maroon">X</font> is <a href="membered.html#V5" target="_self">natural-membered</a> or  <a href="setfam_1.html#K1">meet</a> <font color="Maroon">F</font> is <a href="membered.html#V5" target="_self">natural-membered</a> )
 <b>by </b><i><a class="ref" href="membered.html#D4" target="_self">Def4</a></i>;<br/>


</div>
