‘α |= β ‘(to mean that the sentence α entails the sentence β) if and only if, in every model in which α is _____ β is also _____
(a) True, true
(b) True, false
(c) False, true
(d) False, false
I had been asked this question in a job interview.
My enquiry is from Knowledge and Reasoning topic in chapter Knowledge and Reasoning of Artificial Intelligence