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: W(z) or ~W_2(z). exists z: ~W_2(z). forall z: W_2(z) or ~W(z).
forall z: W_2(z) -> W(z) can be inferred via the universal rewriting rule. forall z: W(z) -> W_2(z) can be inferred via the universal rewriting rule.