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<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font>, <font color="Maroon">c<sub>4</sub></font> be    <a href="hidden.html#M1">set</a> ;<br/>







<b>assume </b><b>that </b><br/><a NAME="E1:63"/><i><font color="Green">E34</font></i>: 
<font color="Maroon">c<sub>1</sub></font> <a href="tarski.html#R1">c=</a> <font color="Maroon">c<sub>2</sub></font>
 <b>and </b><br/><a NAME="E2:63"/><i><font color="Green">E35</font></i>: 
<font color="Maroon">c<sub>3</sub></font> <a href="tarski.html#R1">c=</a> <font color="Maroon">c<sub>4</sub></font>
 <b>and </b><br/><a NAME="E3:63"/><i><font color="Green">E36</font></i>: 
<font color="Maroon">c<sub>2</sub></font> <a href="xboole_0.html#R1">misses</a> <font color="Maroon">c<sub>4</sub></font>
 ;<br/>

<a NAME="E4:63"/>
<font color="Maroon">c<sub>1</sub></font> <a href="xboole_0.html#R1">misses</a> <font color="Maroon">c<sub>4</sub></font>
 
<b>by </b><i><a class="txt" href="xboole_1.html#E1:63"><i><font color="Green">E34</font></i></a>, <a class="txt" href="xboole_1.html#E3:63"><i><font color="Green">E36</font></i></a>, <a class="ref" href="xboole_1.html#T63" target="_self">Th63</a></i>;<br/>
<b>hence </b><a NAME="E5:63"/>
<font color="Maroon">c<sub>1</sub></font> <a href="xboole_0.html#R1">misses</a> <font color="Maroon">c<sub>3</sub></font>
 <b>by </b><i><a class="txt" href="xboole_1.html#E2:63"><i><font color="Green">E35</font></i></a>, <a class="ref" href="xboole_1.html#T63" target="_self">Th63</a></i>;<br/>


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