Consider the following premises. Jennifer is a writer. If Charles drinks water, then Sarah is rich. If Sarah were rich, then Jennifer is not a writer. Can we infer the following from them? Charles is drinking water.
 From the fact that if Sarah were rich, then Jennifer is not a writer, and that Jennifer is a writer we can infer that Sarah is not rich. Finally, from the fact that if Charles drinks water, then Sarah is rich, and that Sarah is not rich we can infer that Charles is not drinking water, which contradicts that Charles is drinking water. Therefore, the answer is no.