What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_4: R_3(z_4) <-> S_2(z_4). forall z_4: P(z_4) -> R_3(z_4). exists z_4: S_2(z_4) or W_4(z_4). forall z_4: W_4(z_4) -> P(z_4).
forall z_4: W_4(z_4) -> R_3(z_4). forall z_4: R_3(z_4) -> S_2(z_4). forall z_4: S_2(z_4) -> R_3(z_4).