document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1171460>Question 1171460</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you help me prove O ⊃ S only using the first 18 rules?\r<BR>\n" );
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document.write( "O ⊃ (Q • N) \r<BR>\n" );
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document.write( "(N v E) ⊃ S.../ O ⊃ S  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #850918 by </B><A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><B>Edwin McCravy(20055)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Edwin+McCravy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=850918\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
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document.write( "1.  O ⊃ (Q • N)\r\n" );
document.write( "2.  (N v E) ⊃ S   .../ O ⊃ S\r\n" );
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document.write( "3.  O ⊃ (N • Q)       1, Commutation\r\n" );
document.write( "4.  O ⊃ N             3, Simplification  \r\n" );
document.write( "5.  O ⊃ (N v E)       4, Addition\r\n" );
document.write( "6.  O ⊃ S           5,2, Hypothetical syllogism\r\n" );
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document.write( "Edwin</PRE> </SPAN>\n" );
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