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: exists z_1: R_4(z_1) or R_3(z_1). forall z_1: W_1(z_1) or ~R_3(z_1). forall z_1: R_4(z_1) -> W_1(z_1). forall z_1: W(z_1) -> ~W_1(z_1).
forall z_1: R_3(z_1) -> W_1(z_1) can be inferred via the universal rewriting rule.