document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=173249>Question 173249</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I can't seem to get to solve this proof.<BR>\n" );
document.write( "1. W->S<BR>\n" );
document.write( "2. U->F<BR>\n" );
document.write( "3. (S and F) -> O<BR>\n" );
document.write( "4. ~O THEREFORE (~W v ~U) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #128073 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=128073\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. W->S<BR>\n" );
document.write( "2. U->F<BR>\n" );
document.write( "3. (S and F) -> O<BR>\n" );
document.write( "4. ~O THEREFORE (~W v ~U)<BR>\n" );
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document.write( "5. ~(S and F) .......................... Modus Tollens (using lines 3, 4)\r<BR>\n" );
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document.write( "6. ~S v ~F .......................... DeMorgan's Theorem (using line 5)\r<BR>\n" );
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document.write( "7. S -> ~F .......................... Material Implication (using line 6)\r<BR>\n" );
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document.write( "8. W -> ~F .......................... Hypothetical Syllogism (using lines 1,7)\r<BR>\n" );
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document.write( "9. ~F -> ~U .......................... Transposition (using line 2)\r<BR>\n" );
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document.write( "10. W -> ~U .......................... Hypothetical Syllogism (using lines 8,10)\r<BR>\n" );
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document.write( "11. ~W v ~U .......................... Material Implication (using line 10) </SPAN>\n" );
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