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_3: U(z_3) or ~P_2(z_3). forall z_3: R(z_3) or P_2(z_3). forall z_3: R(z_3) -> U(z_3).
forall z_3: P_2(z_3) -> U(z_3) can be inferred via the universal rewriting rule.