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: Charles is not drinking water. Linda is not writing a letter or Richard is driving a car. Linda is writing a letter or Charles is drinking water. It is overcast or Richard is not driving a car.
Charles is drinking water or Richard is driving a car can be inferred via the resolution rule. If Richard drives a car, then it is overcast can be inferred via the rewriting rule.