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cyberk cyberk
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3 years ago
Consider this proof, (1.) E • D (2.) ~ (E • D) ≡ O/∴ Ev~O (3.) [~ (E • D) ⊃ O] • [O ⊃ ~ (E • D)] (4.) [O ⊃ ~(E•D)]• [~(E•D) ⊃ O] (5.) O ⊃ ~ (E • D) (6.) ~ ~ (E • D) (7.) ~ O (8.) ~ O v E (9.) E v ~ O What is the justification for line 5?

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Textbook 
How to Think Logically

How to Think Logically


Edition: 2nd
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edwardssheedwardsshe
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cyberk Author
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3 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
annabananerz
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Smart ... Thanks!
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This site is awesome
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