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: It is not late. If it is late, then it is raining. It is late or it is not raining.
It is not raining can be inferred via the disjunctive syllogism rule. If it rains, then it is late can be inferred via the rewriting rule.