What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_17: P_12(x_17) -> ~Q_12(x_17). forall x_17: T_2(x_17) -> P_3(x_17). forall x_17: P_3(x_17) -> T_2(x_17). exists x_17: Q_12(x_17). forall x_17: P_12(x_17) <-> T_2(x_17).
exists x_17: ~P_12(x_17). forall x_17: T_2(x_17) <-> P_3(x_17). forall x_17: P_3(x_17) <-> T_2(x_17). forall x_17: P_12(x_17) -> T_2(x_17). forall x_17: T_2(x_17) -> P_12(x_17).