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Determine whether the following statement pattern is a tautology, contradiction, or contingency. [(~p ∧ q) ∧ (q ∧ r)] ∨ (~q) - Mathematics and Statistics

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Question

Determine whether the following statement pattern is a tautology, contradiction, or contingency.

[(~p ∧ q) ∧ (q ∧ r)] ∨ (~q)

Sum
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Solution

p q r ~p ~q ~p∧q q∧r (~p∧q)∧(q∧r) [(~p∧q)∧(q∧r)]∨(~q)
T T T F F F T F F
T T F F F F F F F
T F T F T F F F T
T F F F T F F F T
F T T T F T T T T
F T F T F T F F F
F F T T T F F F T
F F F T T F F F T

Truth values in the last column are not identical. Hence, it is contingency.

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Notes

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Chapter 1: Mathematical Logic - Miscellaneous Exercise 1 [Page 33]

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Balbharati Mathematics and Statistics 1 (Commerce) [English] Standard 12 Maharashtra State Board
Chapter 1 Mathematical Logic
Miscellaneous Exercise 1 | Q 4.13 | Page 33
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