document.write( "Question 227929: I need help solving this proof.
\n" ); document.write( "P,QvR,~RvS,~Q |- P&S\r
\n" ); document.write( "\n" ); document.write( "1 (1) P A
\n" ); document.write( "2 (2) QvR A
\n" ); document.write( "3 (3) ~RvS A
\n" ); document.write( "4 (4) ~Q A \n" ); document.write( "

Algebra.Com's Answer #169321 by jim_thompson5910(35256) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "1.   P\r\n" );
document.write( "2.   Q v R\r\n" );
document.write( "3.   ~R v S\r\n" );
document.write( "4.   ~Q                 / P & S\r\n" );
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document.write( "5.   R                          2,4    Disjunctive Syllogism\r\n" );
document.write( "6.   ~~R                          5    Double Negation\r\n" );
document.write( "7.   S                          3,6    Disjunctive Syllogism  \r\n" );
document.write( "8.   P & S                      1,7    Conjunction\r\n" );
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