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: P(z) or ~W_3(z). W_3(f).
exists x: W_3(x) can be inferred via the existential generalization rule. forall z: W_3(z) -> P(z) can be inferred via the universal rewriting rule.