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: exists y: Q_3(y) -> T(y). forall y: S(y). forall y: R_2(y). forall y: R_2(y) -> Q_3(y).
forall y: Q_3(y) can be inferred via the universal modus ponens rule. exists y: R_2(y) -> T(y) can be inferred via the existential transitivity rule. forall y: S(y) and R_2(y) can be inferred via the universal conjunction rule. forall y: R_2(y) and S(y) can be inferred via the universal conjunction rule.