What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x_11: Q_11(x_11) -> W(x_11). exists x_11: W(x_11). forall x_11: ~Q_11(x_11). forall x_11: W(x_11) <-> Q_11(x_11).
Since the premises are contradictory, we can infer anything from them.