document.write( "Question 980640: E>R
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\n" ); document.write( "~Y>(CvE)
\n" ); document.write( "~Y
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Algebra.Com's Answer #602340 by Edwin McCravy(20054)\"\" \"About 
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document.write( " 1.  E>R\r\n" );
document.write( " 2.  C>V\r\n" );
document.write( " 3.  ~Y>(CvE)\r\n" );
document.write( " 4.  ~Y\r\n" );
document.write( "                 /VvR\r\n" );
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document.write( " 5. CvE           3,4, Modus Ponens\r\n" );
document.write( " 6. VvR         2,1,6, Constructive Dilemma\r\n" );
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document.write( "Edwin
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