What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_19: T_4(x_19) <-> U(x_19). exists x_19: P_19(x_19) <-> Q_19(x_19). forall x_19: ~Q_19(x_19). forall x_19: T_4(x_19) <-> P_19(x_19).
forall x_19: T_4(x_19) -> U(x_19). forall x_19: T_4(x_19) -> P_19(x_19). exists x_19: P_19(x_19) -> Q_19(x_19). forall x_19: U(x_19) -> T_4(x_19). forall x_19: P_19(x_19) -> T_4(x_19). exists x_19: Q_19(x_19) -> P_19(x_19). exists x_19: ~P_19(x_19).