document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=730138>Question 730138</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with the following proof.  \r<BR>\n" );
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document.write( "~PvR, ~Qv~R : P -> ~(P<->Q)\r<BR>\n" );
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document.write( "I know it is supposed to involve the \"or elimination rule\" but I am not sure how to work it in with the assumptions. </SPAN>\n" );
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