What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_3: Q(z_3) <-> U(z_3). r or ~Q(f).
Q(f) -> r. forall z_3: Q(z_3) -> U(z_3). forall z_3: U(z_3) -> Q(z_3).