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Q. The process of obtaining a proposition from a propositional function by substituting a constant for a variable is called …………………………………

Q. If A is true, X is false , then the truth value of the compound statement (~A v ~X)

Q. Compound propositions are also known as ________.

Q. …………………………..Symbol is used for bi –conditional

Q. The truth value of _______ statement is true.

Q. If x) Mx is true, then x) Mx is …………………

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

Q. If the specific form of a given argument has any substitution instance whose premises are true and whose conclusion is false, then the given argument is.

Q. Name the rule of inference ( p . q ) ≡ ( q . p )

Q. Mathematical logic is also called…………………………………….