Question: Answer with the abbreviation for the RL derivation rule (EI, EE, AI, AE, QN). Suppose (3y)(Py A Qy) is a premise in the proof, next

Answer with the abbreviation for the RL derivation rule (EI, EE, AI, AE, QN). Suppose (3y)(Py A Qy) is a premise in the proof, next suppose that Pb A Obis assumed (where b is foreign to the proof), then suppose that -(3x) Mix is derived in the subproof using the RL derivation rules, what rule would allow you to derive -(3x) M x from (3y)(Py A Qy) and subproof ending in -(3x) Mx
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