What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: T_2(z) <-> Q_2(z). forall z: ~R_1(z). forall z: R_1(z) -> T_2(z). exists z: T_2(z) -> R_1(z).
exists z: ~T_2(z). exists z: T_2(z) <-> R_1(z). exists z: R_1(z) <-> T_2(z). forall z: T_2(z) -> Q_2(z). forall z: Q_2(z) -> T_2(z).