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ВОРОТА | GATE CS 2013 | Вопрос 65

Каков логический перевод следующего утверждения?

  "None of my friends are perfect." 


(А) А
(Б) Б
(С) С
(D) D

Ответ: (Д)
Объяснение:

F(x) ==> x is my friend
P(x) ==> x is perfect

D is the correct answer.

A. There exist some friends which are not perfect

B. There are some people who are not my friend and are perfect

C. There exist some people who are not my friend and are not perfect.

D. There doesn't exist any person who is my friend and perfect 

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ВОРОТА | GATE CS 2013 | Вопрос 65

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