<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E18">Th20</font></span>: <a NAME="T20"><span class="comment"><font color="firebrick">:: GOEDELCP:20</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">Al</font> being    <a href="qc_lang1.html#M1" title="QC_LANG1:mode.1">QC-alphabet</a>   st <font color="Olive" title="b1">Al</font> is  <a href="card_3.html#V4" title="CARD_3:attr.4">countable</a>  holds <br/>(  not  <a href="goedelcp.html#K1" title="GOEDELCP:func.1">ExCl</a> <font color="Olive" title="b1">Al</font> is  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>  &amp;  <a href="goedelcp.html#K1" title="GOEDELCP:func.1">ExCl</a> <font color="Olive" title="b1">Al</font> is  <a href="card_3.html#V4" title="CARD_3:attr.4">countable</a>  )</div></div>
