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_8: P(x_8). exists x_8: ~P_8(x_8). forall x_8: P_8(x_8) <-> P(x_8).
Since the premises are contradictory, we can infer anything from them.