What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists z_4: R(z_4) or ~W_1(z_4). forall z_4: W_1(z_4) <-> R(z_4).
exists z_4: W_1(z_4) -> R(z_4). forall z_4: W_1(z_4) -> R(z_4). forall z_4: R(z_4) -> W_1(z_4).