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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  non <a href="struct_0.html#V3">empty</a> <a href="sheffer1.html#V10">satisfying_Sheffer_1</a> <a href="sheffer1.html#V11">satisfying_Sheffer_2</a> <a href="sheffer1.html#V12">satisfying_Sheffer_3</a>  <a href="sheffer1.html#L1">ShefferStr</a> ;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font>, <font color="Maroon">c<sub>4</sub></font>, <font color="Maroon">c<sub>5</sub></font>, <font color="Maroon">c<sub>6</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>











<a NAME="E1:149"/>
<span class="p1">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>6</sub></font> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="sheffer1.html#K5">|</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>6</sub></font> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>6</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="sheffer1.html#K5">|</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>5</sub></font> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>5</sub></font></span>)</span> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>4</sub></font></span>)</span>
 
<b>by </b><i><a class="ref" href="sheffer2.html#T73" target="_self">Th73</a></i>;<br/>
<b>hence </b><a NAME="E2:149"/>
<span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>6</sub></font> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span> <a href="sheffer1.html#K5">|</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon">c<sub>6</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="sheffer1.html#K5">|</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon">c<sub>5</sub></font> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>5</sub></font></span>)</span> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>4</sub></font> <a href="sheffer1.html#K5">|</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>6</sub></font> <a href="sheffer1.html#K5">|</a> <font color="Maroon">c<sub>5</sub></font></span>)</span>
 <b>by </b><i><a class="ref" href="sheffer2.html#T133" target="_self">Th133</a></i>;<br/>


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