document.write( "Question 1206984: D ⊃ E
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Algebra.Com's Answer #844756 by mccravyedwin(407)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "She's right. It was a typo I made in step 4. \r\n" );
document.write( "I had a 2 there that should have been a 1. \r\n" );
document.write( "I fixed it, in red below\"\r\n" );
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document.write( "1. D ⊃ E\r\n" );
document.write( "2. D v A\r\n" );
document.write( "3. ~E                           / A\r\n" );
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document.write( "4. ~D      1,3, modus tollens\r\n" );
document.write( "5. A       2,4, disjunctive syllogism  \r\n" );
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document.write( "Edwin
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