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_9, x_9 will read a book. There is at least one x_9 for which x_9 is a politician. For all x_9, if x_9 reads a book, then x_9 is not a politician.
Since the premises are contradictory, we can infer anything from them.