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<b>let </b><font color="Maroon" title="c1">T</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <a href="cqc_lang.html#K4" title="CQC_LANG:func.4">CQC-WFF</a> ;<br/>

<b>assume </b><a NAME="E1:55"/><i><font color="Green" title="E47">A1</font></i>: 
<font color="Maroon" title="c1">T</font> <a href="cqc_the1.html#NR1" title="CQC_THE1:NR.1">is_a_theory</a> 
 ;<br/>

<a NAME="E2:55"/>
 <a href="cqc_the1.html#K1" title="CQC_THE1:func.1">Cn</a> <span class="p1">(<span class="default"><a href="subset_1.html#K1" title="SUBSET_1:func.1">{}</a> <a href="cqc_lang.html#K4" title="CQC_LANG:func.4">CQC-WFF</a> </span>)</span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a>  <a href="cqc_the1.html#K1" title="CQC_THE1:func.1">Cn</a> <font color="Maroon" title="c1">T</font>
 
<b>by </b><i><a class="ref" href="cqc_the1.html#T39" target="_self" title="CQC_THE1:th.39">Th39</a>, <a class="ref" href="xboole_1.html#T2" title="XBOOLE_1:th.2">XBOOLE_1:2</a></i>;<br/>
<b>hence </b><a NAME="E3:55"/>
 <a href="cqc_the1.html#K4" title="CQC_THE1:func.4">TAUT</a>  <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c1">T</font>
 <b>by </b><i><a class="txt" href="cqc_the1.html#E1:55"><i><font color="Green" title="E47">A1</font></i></a>, <a class="ref" href="cqc_the1.html#T41" target="_self" title="CQC_THE1:th.41">Th41</a></i>;<br/>


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