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_4: W(z_4) or ~R_4(z_4). exists z_4: R_4(z_4) or ~T(z_4).
forall z_4: R_4(z_4) -> W(z_4) can be inferred via the universal rewriting rule. exists z_4: T(z_4) -> R_4(z_4) can be inferred via the existential rewriting rule.