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

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

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