document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=636868>Question 636868</A>: <I><SPAN STYLE=\"word-break: break-all;\"> determine whether the argument is valid or invalid. You may compare the argument to a standard form, or use a truth table.<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 #401258 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=401258\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The argument <font color=\"red\">invalid</font>. Draw out the table to get\r<BR>\n" );
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document.write( "  <TD >V</TD>\r\n" );
document.write( "  <TD >W</TD>\r\n" );
document.write( "  <TD >V->W</TD>\r\n" );
document.write( "  <TD >W</TD>\r\n" );
document.write( "  <TD >V</TD>\r\n" );
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document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
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document.write( "<TR ALIGN=center>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
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document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
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document.write( "<TR ALIGN=center>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
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document.write( "The premises are columns 3 and 4. The conclusion is column 5.\r<BR>\n" );
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document.write( "Notice how row 3 has all true premises, but a false conclusion. So this shows us that this argument is <font color=\"red\">invalid</font>.\r<BR>\n" );
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document.write( "<TR ALIGN=center>\r\n" );
document.write( "  <TD >V</TD>\r\n" );
document.write( "  <TD >W</TD>\r\n" );
document.write( "  <TD >V->W</TD>\r\n" );
document.write( "  <TD >W</TD>\r\n" );
document.write( "  <TD >V</TD>\r\n" );
document.write( "</TR>\r\n" );
document.write( "<TR ALIGN=center>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "</TR>\r\n" );
document.write( "<TR ALIGN=center>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "</TR>\r\n" );
document.write( "<TR ALIGN=center>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD ><font color=\"red\">T</font></TD>\r\n" );
document.write( "  <TD ><font color=\"red\">T</font></TD>\r\n" );
document.write( "  <TD ><font color=\"red\">F</font></TD>\r\n" );
document.write( "</TR>\r\n" );
document.write( "<TR ALIGN=center>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >T</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
document.write( "  <TD >F</TD>\r\n" );
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