document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1157678>Question 1157678</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. A -> (B • C)<BR>\n" );
document.write( "2. ~[(B • D) • C]<BR>\n" );
document.write( "3. D          <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #780862 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=780862\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=black size=3><BR>\n" );
document.write( "It's not clear how the tutor @Edwin McCravy guessed the conclusion should be ~A. Though if this is the case, then his derivation table is mostly correct except the \"transposition\" reason (line 11) should be \"modus tollens\". <BR>\n" );
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