Multiple Choice
construct a complete truth table for each of the following propositions. Then, using the truth table, classify each proposition as a tautology, a contingency, or a contradiction.
-[(Q ⊃ R) ⊃ (R ⊃ S) ] ≡ ∼(∼Q S)
A) Tautology
B) Contingency
C) Contradiction
Correct Answer:

Verified
Correct Answer:
Verified
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