Consider the following premises. Barbara is a soldier if and only if Jennifer is a nurse. Barbara is a soldier if and only if Sarah is rich. For all z, z is rich if and only if z will drink water. Jennifer is not a nurse. Can we infer the following from them? Sarah is drinking water.
 From the fact that Barbara is a soldier if and only if Jennifer is a nurse, and that Jennifer is not a nurse we can infer that Barbara is not a soldier. From the fact that for all z, z is rich if and only if z will drink water we can infer that Sarah is rich if and only if Sarah is drinking water. From the fact that Barbara is a soldier if and only if Sarah is rich, and that Barbara is not a soldier we can infer that Sarah is not rich. Finally, from the fact that Sarah is rich if and only if Sarah is drinking water, and that Sarah is not rich we can infer that Sarah is not drinking water, which contradicts that Sarah is drinking water. Therefore, the answer is no.