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Question 71Asked in UGC NET Computer Science, June 2017 (Paper II & III, Selected Questions)

Consider following two rules R1 and R2 in logical reasoning in Artificial Intelligence (AI):

Consider following two rules R1 and R2 in logical reasoning in Artificial Intelligence (AI): R1 : from α ⊃ β and α infer β is known as Modus Tollens (MT) R2 : From α ⊃ β and ¬α infer ¬β is known as Modus Ponens (MP)
  1. AOnly R1 is correct
  2. BOnly R2 is correct
  3. CBoth R1 and R2 are correct
  4. DNeither R1 nor R2 is correct
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Correct answer: (D) Neither R1 nor R2 is correct

Explanation

From α ⊃ β and α infer β is Modus Ponens (not Modus Tollens), and Modus Tollens infers ¬α from α ⊃ β and ¬β. R2 is not Modus Ponens either. So neither R1 nor R2 is correct.

From UGC NET Computer Science PYQ, June 2017 (Paper II & III, Selected Questions)

This is question 71 of UGC NET Computer Science PYQ, June 2017 (Paper II & III, Selected Questions). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.