Consider the following premises. Jennifer is a janitor. If Linda drinks water, then Jennifer is not a janitor. If Richard were a sailor, then Linda is drinking water. Can we infer the following from them? If we can, name the inference rule being used: Richard is not a sailor.
 From the fact that if Linda drinks water, then Jennifer is not a janitor, and that Jennifer is a janitor we can infer that Linda is not drinking water via modus tollens. Finally, from the fact that if Richard were a sailor, then Linda is drinking water, and that Linda is not drinking water we can infer that Richard is not a sailor via modus tollens. Therefore, the answer is yes.