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130 bytes added ,  15:36, 6 December 2008
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===More thoughts on Peirce's law===
 
===More thoughts on Peirce's law===
   −
1-way version
+
1-way version:  <math>((a \Rightarrow b) \Rightarrow a) \Rightarrow a</math>
    
<pre>
 
<pre>
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</pre>
 
</pre>
   −
2-way version
+
2-way version:  <math>((a \Rightarrow b) \Rightarrow a) \Leftrightarrow a</math>
    
<pre>
 
<pre>
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