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: T(z) -> R_2(z). forall z: T(z) -> Q(z). forall z: R_2(z) -> T(z).
forall z: R_2(z) -> Q(z) can be inferred via the universal transitivity rule. forall z: T(z) <-> R_2(z) can be inferred via the universal biconditional introduction rule. forall z: R_2(z) <-> T(z) can be inferred via the universal biconditional introduction rule.