Question

Represent (A + B) (B + C) (C + A) in NOR-to-NOR form. 05

OR

(b)(i) Prove that the argument given below is a valid argument. → (​

Answer 1

${\huge {\overbrace {\underbrace {\bold {\red {(a + b)(b + c)(c + a)}}}}}}$

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Answer 2

Explanation:

An argument form is valid if whenever true statements are substituted in for the statement variables the conclusions is always true. ... If the conclusion is false in a critical row, then the argument is invalid. Otherwise, the argument is valid (since the conclusion is always true when the premises are true).