What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_11: Q(x_11) <-> S_11(x_11). ~Q(e). ~S_11(e) -> u.
forall x_11: Q(x_11) -> S_11(x_11). forall x_11: S_11(x_11) -> Q(x_11).