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Please construct this Indirect Proof: (P →R),(Q→S),¬(P ∧S)⊢¬(P ∧Q)

Posted: Thu May 12, 2022 2:21 pm
by answerhappygod
Please construct this Indirect Proof:
(P →R),(Q→S),¬(P ∧S)⊢¬(P ∧Q)