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: For all x_8, x_8 is not a nurse. For all x_8, x_8 is rich. For all x_8, if x_8 were rich, then x_8 is a nurse.
Since the premises are contradictory, we can infer anything from them.