document.write( "Question 1141207: A → ~B
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Algebra.Com's Answer #762130 by Edwin McCravy(20054)\"\" \"About 
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document.write( "1.  A → ~B\r\n" );
document.write( "2.  ~ (C • ~A)                               /C → ~B\r\n" );
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document.write( "3.  ~C ∨ ~~A            2, deMorgan's law\r\n" );
document.write( "4.  ~C ∨ A              3, double negation\r\n" );
document.write( "5.  C → A               4, material equivalence\r\n" );
document.write( "6.  C → ~B              5,1, hypothetical syllogism\r\n" );
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document.write( "Edwin
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