Q. 63 Which one of the following Bookean expressions in NOT a tautology?
(A)((a→b)∧(b→c))→(a→c)((a→b)∧(b→c))→(a→c)
(B)(a→c)→(∼b→(a∧c))(a→c)→(∼b→(a∧c))
(C)(a∧b∧c)→(c∨a)(a∧b∧c)→(c∨a)
(C)a→(b→a)
Answer: (B)
Explanation:
Q. 63 Which one of the following Bookean expressions in NOT a tautology?
(A)((a→b)∧(b→c))→(a→c)((a→b)∧(b→c))→(a→c)
(B)(a→c)→(∼b→(a∧c))(a→c)→(∼b→(a∧c))
(C)(a∧b∧c)→(c∨a)(a∧b∧c)→(c∨a)
(C)a→(b→a)
Answer: (B)
Explanation:
