Things Are Pleasant If, and Only If, They Are Not

question 292

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 is a good assumption for conditional proof for the above argument?

• A) (∃x)∼Nx
• B) ∼(∃x)Nx
• C) ∼(∃x)∼Nx
• D) ∼Nx
• E) Nx

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