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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E17">Th17</font></span>: <a NAME="T21"><span class="comment"><font color="firebrick">:: CQC_THE1:21</font></span><br/></a><div class="add"> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="cqc_the1.html#K2" title="CQC_THE1:func.2">Proof_Step_Kinds</a>  &amp;  ...  &amp; 9 <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="cqc_the1.html#K2" title="CQC_THE1:func.2">Proof_Step_Kinds</a>  ;<br/></div></div>
