What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_9: P_5(x_9) <-> P_1(x_9). forall x_9: P_1(x_9) <-> T(x_9).
forall x_9: P_1(x_9) -> T(x_9). exists x_9: P_5(x_9) -> P_1(x_9). forall x_9: T(x_9) -> P_1(x_9). exists x_9: P_1(x_9) -> P_5(x_9).