<?xml version="1.0"?>
<div class="add">

<a NAME="E1:4"/>
<span class="p1">(<span class="default">2 <a href="nat_1.html#K4" title="NAT_1:func.4">*</a> <a href="numbers.html#K6" title="NUMBERS:func.6">0</a> </span>)</span> <a href="nat_1.html#K2" title="NAT_1:func.2">+</a> 1 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1
 
;<br/>
<b>hence </b><a NAME="E2:4"/>
not 1 is <a href="abian.html#V1" title="ABIAN:attr.1">even</a>
 ;<br/>


</div>
