Which of the following are valid (necessarily true) sentences? a. (x x = x) ( y

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Which of the following are valid (necessarily true) sentences?

a. (∃x x = x) ⇒ (∀ y ∃z y = z).

b. ∀x P(x) ∨¬P(x).

c. ∀ x Smart(x) ∨ (x = x).

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Artificial Intelligence A Modern Approach

ISBN: 978-0136042594

3rd edition

Authors: Stuart Russell, Peter Norvig

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Question Posted: Jan 05, 2019 11:11 AM

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Which of the following are valid (necessarily true) sentences? a. (x x = x) ( y

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Validity in firstorder logic requires truth in all possible models ...View the full answer

Artificial Intelligence A Modern Approach

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