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