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Things Are Pleasant If, and Only If, They Are Not ∨ \lor

Question 182

Multiple Choice

Things are pleasant if, and only if, they are not too crowded. Everything too crowded is noisy. So if something isn't noisy, then something is pleasant.
-Which of the following propositions can also be proved from the premises of the above argument?


A) (∀x) Nx ∨ \lor (∀x) Px
B) (∀x) (Nx ≡ Cx)
C) (∀x) (Nx ∨ \lor Px)
D) (∀x) (Nx ∨ \lor Cx)
E) (∀x) [Nx ⊃ (∼Px • Cx) ]

Correct Answer:

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