Consider the following premises. For all x_9, if x_9 drives a car, then x_9 is drinking water. For all x_9, x_9 will play a game or x_9 will not drink water. For all x_9, if x_9 plays a game, then x_9 is driving a car. Can we infer the following from them? If Sarah drinks water, then Sarah is driving a car.
 From the fact that for all x_9, x_9 will play a game or x_9 will not drink water we can infer that for all x_9, if x_9 drinks water, then x_9 is playing a game. From the fact that for all x_9, if x_9 drinks water, then x_9 is playing a game, and that for all x_9, if x_9 plays a game, then x_9 is driving a car we can infer that for all x_9, if x_9 drinks water, then x_9 is driving a car. From the fact that for all x_9, if x_9 drives a car, then x_9 is drinking water, and that for all x_9, if x_9 drinks water, then x_9 is driving a car we can infer that for all x_9, x_9 will drive a car if and only if x_9 will drink water. From the fact that for all x_9, x_9 will drive a car if and only if x_9 will drink water we can infer that Sarah is driving a car if and only if Sarah is drinking water. Finally, from the fact that Sarah is driving a car if and only if Sarah is drinking water we can infer that if Sarah drinks water, then Sarah is driving a car. Therefore, the answer is yes.