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Question

Examine whether the following logical statement pattern is tautology, contradiction or contingency
[(pq)q]p

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Solution

p q pq (pq)q [pq)q]p
TTTTT
TFFFT
FTTTF
FFTFT
Since the truth table contains neither all T nor all F is the last column.
[(pq)q]p is a contingency.

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