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: Q_1(z) -> T(z). forall z: T(z) -> Q_1(z).
forall z: Q_1(z) <-> T(z) can be inferred via the universal biconditional introduction rule. forall z: T(z) <-> Q_1(z) can be inferred via the universal biconditional introduction rule.