Consider the following premises. If Barbara drinks water, then Jessica is taking a plane. If Elisabeth drives a car, then Barbara is drinking water. If Elisabeth were a writer, then Barbara is drinking water. For all x, x is a writer or x will drive a car. Can we infer the following from them? Jessica is taking a plane.
 From the fact that for all x, x is a writer or x will drive a car we can infer that Elisabeth is a writer or Elisabeth is driving a car. From the fact that if Elisabeth were a writer, then Barbara is drinking water, that if Elisabeth drives a car, then Barbara is drinking water, and that Elisabeth is a writer or Elisabeth is driving a car we can infer that Barbara is drinking water. Finally, from the fact that if Barbara drinks water, then Jessica is taking a plane, and that Barbara is drinking water we can infer that Jessica is taking a plane. Therefore, the answer is yes.