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_17: ~P_17(x_17). forall x_17: ~Q_17(x_17). forall x_17: P_17(x_17) or Q_17(x_17). q -> ~Q_14(a_9).
Since the premises are contradictory, we can infer anything from them.