What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_2: S(z_2) <-> S_2(z_2). exists z_2: ~W(z_2). forall z_2: S_2(z_2). forall z_2: S(z_2) <-> W(z_2).
Since the premises are contradictory, we can infer anything from them.