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: William is driving a car or it is overcast. It is not windy. For all y, if y drives a car, then y is sad. If it is overcast, then William is sad. It is windy or Linda is a cashier. If Patricia climbs a mountain, then William is not sad.
Linda is a cashier can be inferred via the disjunctive syllogism rule.