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<b>take </b><font color="Maroon">c<sub>1</sub></font> = <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><span class="p2">(<span class="default"><a href="cat_1.html#K8">1Cat</a> 0,1</span>)</span></span><a href="tarski.html#K1">}</a></span>;<br/>

<b>let </b><font color="Maroon">c<sub>2</sub></font> be    <a href="subset_1.html#M1">Element</a> of <font color="Maroon">c<sub>1</sub></font>; <i><font color="Red">:: according to </font></i><a class="ref" href="cat_5.html#D5" target="_self">CAT_5:def 5</a><br/>

<b>thus </b><a NAME="E1:22_1_1"/>
<font color="Maroon">c<sub>2</sub></font> is   <a href="cat_1.html#NM4">Category</a>
 <b>by </b><i><a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>


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