What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_3: P_1(z_3) or ~R_1(z_3). forall z_3: U(z_3) or R_1(z_3). forall z_3: P_1(z_3) -> U_1(z_3). forall z_3: U(z_3) -> P_1(z_3).
forall z_3: U(z_3) -> U_1(z_3). forall z_3: R_1(z_3) -> P_1(z_3).