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(p → q) ∨ (q → p)

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Determine whether the following statement patterns are tautologies contradictions or contingencies :

(p → q) ∨ (q → p)

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Best answer

(p → q) ∨ (q → p)

All the entries in the last column of the above truth table are T. 

∴ (p → q) ∨ (q → p) is a tautology.

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