Suppose the statement ((P ∧ Q) ∨ R) ⇒ (R ∨ S) is false. Find the truth values of P, Q, R, and S. (This can be done without a truth table.)
Added by Marcus G.
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In this case, P and Q are both false, so R is also false. So the truth values of P,Q,R and S are all false. Show more…
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