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Using the truth table, verify ~(p → ~q) ≡ p ∧ ~ (~ q) ≡ p ∧ q. - Mathematics and Statistics

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Question

Using the truth table, verify

~(p → ~q) ≡ p ∧ ~ (~ q) ≡ p ∧ q.

Sum
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Solution

1 2 3 4 5 6 7 8
p q ~q p → ~q ~(p → ~q) ~(~q) p ∧ ~(~q) p ∧ q
T T F F T T T T
T F T T F F F F
F T F T F T F F
F F T T F F F F

In the above table, entries in columns 5, 7, and 8 are identical.

∴ ~(p → ~q) ≡ p ∧ ~ (~ q) ≡ p ∧ q.

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Chapter 1: Mathematical Logic - Exercise 1.6 [Page 16]
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