What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: T_3(z) or P(z). forall z: U(z) <-> T_3(z). forall z: ~U(z).
forall z: U(z) -> T_3(z). forall z: T_3(z) -> U(z). forall z: ~T_3(z).