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Please help solving a proof

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Please help me solve this proof, the third line is the conclusion.

1. E-> (CvD) 

2. C -> ~E 

 ~EvD?
Mar 4th, 2015

1. E ->(CvD)... ~EvCvD....(~EvD)vC....~(~EvD) ->C

2 C ->~E

So  Law of syllogism  from premise  1, 2  :

~(~EvD) -> ~ E

(~EvD)v~E

(~Ev~E)vD.....~EvD

~EvD   is a valid argument

May 31st, 2015

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Mar 4th, 2015
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Mar 4th, 2015
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