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(Solved): Please solve! Question 12 (6 points) Consider the sentence V[Sad(x) Happy(x)] for the domain ...

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Question 12 (6 points) Consider the sentence Væ[Sad(x) — Happy(x)] for the domain of people. Which of the following English s

Question 12 (6 points) Consider the sentence Væ[Sad(x) — Happy(x)] for the domain of people. Which of the following English sentences are logically equivalent expressions? Assume that unhappy is the negation of happy. Assume that unhappy is the negation of happy. People that are sad are not happy. UNhappy are necessarily sad. No one is sad and happy. Someone is not happy if and only if they are sad. No one who is not happy is sad. Unhappy people are sad.

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The meaning of above sentence is, for all x if x is sad then x is not happy(unhappy). so,theANS:People that are sad are not happy. Explaination: why other answers are fa
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