document.write( "Question 1099349: Please help!\r
\n" ); document.write( "\n" ); document.write( "A ⊃ B
\n" ); document.write( "A ⊃ (B ⊃ C)
\n" ); document.write( "B ⊃ (C ⊃ D)
\n" ); document.write( "∴ A ⊃ D
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Algebra.Com's Answer #713787 by Edwin McCravy(20055) $\"\"$ $\"About$

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 1.  A ⊃ B\r\n" );
document.write( " 2.  A ⊃ (B ⊃ C)\r\n" );
document.write( " 3.  B ⊃ (C ⊃ D)      /∴ A ⊃ D\r\n" );
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document.write( "                   |4.  A          ACP\r\n" );
document.write( "                   |5.  B        1,4, MP\r\n" );
document.write( "                   |6.  B ⊃ C    2,4, MP\r\n" );
document.write( "                   |7.  C        6,5, MP\r\n" );
document.write( "                   |8.  C ⊃ D    3,5, MP\r\n" );
document.write( "                   |9.  D        8,7, MP\r\n" );
document.write( "10. A ⊃ D                        4-9 CP\r\n" );
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document.write( "Edwin

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