What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_2: T(z_2) or U_3(z_2). forall z_2: T(z_2) -> R(z_2). r_4. forall z_2: ~R(z_2).
forall z_2: ~T(z_2).