document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=160240>Question 160240</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I don't understand the logic proofs\r<BR>\n" );
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document.write( "not k<BR>\n" );
document.write( "not l then h<BR>\n" );
document.write( "j then k<BR>\n" );
document.write( "h then j<BR>\n" );
document.write( "therefore l \r<BR>\n" );
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document.write( "i understand modus tollens, modus ponens, law of sillogysm and law of contrapositives but not how they apply to a proof as long as the above.<BR>\n" );
document.write( "i also don't understand how to do the proofs and reasons, the above has 7 of each <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #118212 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=118212\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> not k<BR>\n" );
document.write( "not l then h<BR>\n" );
document.write( "j then k<BR>\n" );
document.write( "h then j<BR>\n" );
document.write( "therefore l <BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Argument:<BR>\n" );
document.write( "not k<BR>\n" );
document.write( "if not k then not J<BR>\n" );
document.write( "If not j then not h<BR>\n" );
document.write( "if not h then not (not l)<BR>\n" );
document.write( "Therefore l<BR>\n" );
document.write( "================= <BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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