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<b>reconsider </b><font color="Maroon" title="c3">a</font> = <font color="Maroon" title="c2">a</font> as    <a href="fraenkel.html#M2" title="FRAENKEL:mode.2">Element</a> of  <a href="fraenkel.html#K1" title="FRAENKEL:func.1">Funcs</a> <font color="Maroon" title="c1">Y</font>,<a href="margrel1.html#K6" title="MARGREL1:func.6">BOOLEAN</a>  ;<br/>
<a NAME="E2:7_1_1"/>
 <a href="margrel1.html#K15" title="MARGREL1:func.15">'not'</a> <font color="Maroon" title="c3">a</font> is    <a href="fraenkel.html#M2" title="FRAENKEL:mode.2">Element</a> of  <a href="fraenkel.html#K1" title="FRAENKEL:func.1">Funcs</a> <font color="Maroon" title="c1">Y</font>,<a href="margrel1.html#K6" title="MARGREL1:func.6">BOOLEAN</a> 
 
;<br/>
<b>hence </b><a NAME="E3:7_1_1"/>
 <a href="margrel1.html#K13" title="MARGREL1:func.13">'not'</a> <font color="Maroon" title="c2">a</font> is    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="bvfunc_1.html#K1" title="BVFUNC_1:func.1">BVF</a> <font color="Maroon" title="c1">Y</font>
 ;<br/>


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