What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_2: Q_4(x_2) -> ~U_4(x_2). forall x_2: U_4(x_2). forall x_2: U(x_2) -> Q_4(x_2).
forall x_2: ~Q_4(x_2).