What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_15: Q_1(x_15) -> Q_9(x_15). forall x_15: Q_9(x_15) -> S_1(x_15). forall x_15: Q_1(x_15) and Q_15(x_15). forall x_15: T(x_15) -> ~S_1(x_15). forall x_15: U_2(x_15) -> T(x_15).
forall x_15: Q_1(x_15) -> S_1(x_15). forall x_15: Q_1(x_15). forall x_15: Q_15(x_15).