document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=415720>Question 415720</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If the argument below is valid, name which of th four valid forms of argument is represented. If it is not valid, name the fallacy that is represented.<BR>\n" );
document.write( " If the water is filtered, then it does not contain lead.<BR>\n" );
document.write( "The water contains lead.<BR>\n" );
document.write( "Therefore, the water is not filtered. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #291387 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=291387\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> argument is valid.\r<BR>\n" );
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document.write( "first statement says that if the water is filtered, then it does not contain lead.\r<BR>\n" );
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document.write( "second statement says the water contains lead.\r<BR>\n" );
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document.write( "conclusion is that the water is not filtered.\r<BR>\n" );
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document.write( "it cannot be filtered because it it was filtered it would not contain lead, but it does.\r<BR>\n" );
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document.write( "the four valid forms of argument are contained in the following reference:\r<BR>\n" );
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document.write( "<a  rel=nofollow HREF= \"http://commonsenseatheism.com/?p=3709\" target = \"_blank\">http://commonsenseatheism.com/?p=3709</a>\r<BR>\n" );
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document.write( "the four valid forms are:\r<BR>\n" );
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document.write( "MODUS PONENS\r<BR>\n" );
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document.write( "If p is true, then q is true<BR>\n" );
document.write( "p is true<BR>\n" );
document.write( "therefore q is true\r<BR>\n" );
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document.write( "MODUS TOLLENS\r<BR>\n" );
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document.write( "if p is  true, then q is true.<BR>\n" );
document.write( "q is not true.<BR>\n" );
document.write( "therefore p is not true\r<BR>\n" );
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document.write( "DILEMMA\r<BR>\n" );
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document.write( "either p or q are true<BR>\n" );
document.write( "if p is true, then r is true.<BR>\n" );
document.write( "if q is true, then r is true.<BR>\n" );
document.write( "therefore r is true.\r<BR>\n" );
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document.write( "SIMPLIFICATION\r<BR>\n" );
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document.write( "p and q are true<BR>\n" );
document.write( "therefore p is true\r<BR>\n" );
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document.write( "Of the 4 forms, I believe MODUS TOLLENS fits the best.\r<BR>\n" );
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document.write( "p is equal to \"if the water is filtered then it does not contain lead\"<BR>\n" );
document.write( "q is equal to \"it does not contain lead\"<BR>\n" );
document.write( "therefore the water is not filtered.\r<BR>\n" );
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document.write( "this is fairly obvious because if the water was filtered it would not contain lead.\r<BR>\n" );
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document.write( "if p is true then q is true<BR>\n" );
document.write( "q is not true (the water contains lead)<BR>\n" );
document.write( "therefore p is not true.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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