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<b>take </b>
 <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a> 
; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> (  <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a>  is <a href="intpro_1.html#V7" title="INTPRO_1:attr.7">MC-closed</a> &amp; not  <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a>  is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a> )</span><br/>

<b>thus </b><a NAME="E1:12_1_1"/>
(  <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a>  is <a href="intpro_1.html#V7" title="INTPRO_1:attr.7">MC-closed</a> &amp; not  <a href="intpro_1.html#K1" title="INTPRO_1:func.1">MC-wff</a>  is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a> )
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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