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

Q. “ If a statement is false, then it implies any statement whatever”

Q. _____________ is the process of obtaining a proposition from a propositional function by substituting a constant for the variable.

Q. A simple proposition is ………………………………………………………………….

Q. The development of symbolic logic has been bound up with the development of ………………………

Q. The statement form p .~p is a ----

Q. If we can construct a formal proof , the argument is _________.

Q. ‘ Something is mortal’ is symbolized as

Q. “If it rains, then the road will be wet” is an example for……………………………………….

Q. In _______ proposition, two simple propositions are combined by ‘either -- or’.