What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_9: Q(x_9) -> Q_1(x_9). forall x_9: ~Q_1(x_9). forall x_9: Q(x_9) -> T_3(x_9). forall x_9: T_3(x_9) -> Q(x_9).
exists x_9: ~Q(x_9). exists x_9: T_3(x_9) -> Q_1(x_9). forall x_9: Q(x_9) <-> T_3(x_9). forall x_9: T_3(x_9) <-> Q(x_9).