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Q. ‘p v q’ is false if _________.

Q. ‘All Keralites are Indians’ is an example for …………………………………………..

Q. In implication, if p is false and q is true, p כ q is -------

Q. Name the rule of replacement (P ≡ q)≡ [(p.q) v (~p.~q)]

Q. Which of the following is the substitution instance of the statement form p. ~p

Q. Validity/ Invalidity refers to

Q. The statement form with only true substitution instances is called _________.

Q. ‘p and negation q’ is the symbolized as

Q. The negation of (x) M x is logically equivalent to……………………………….

Q. The statement form with only false substitution instances is called _________.