What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists z: ~T_3(z). forall z: T_3(z) <-> R(z). forall z: R(z) <-> P(z).
forall z: T_3(z) -> R(z). forall z: R(z) -> P(z). forall z: R(z) -> T_3(z). forall z: P(z) -> R(z). exists z: ~R(z).