What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall z: P_2(z) <-> Q_3(z). forall z: T(z) -> P_2(z). exists z: T(z) or Q_3(z).
forall z: P_2(z) -> Q_3(z) can be inferred via the universal biconditional elimination rule. forall z: Q_3(z) -> P_2(z) can be inferred via the universal biconditional elimination rule.