Consider the following premises. For all x_4, if x_4 were a cashier, then x_4 is driving a car. For all x_4, if x_4 were a soldier, then x_4 is a cashier. For all x_4, if x_4 drives a car, then x_4 is a soldier. Can we infer the following from them? If Susan were a cashier, then Susan is driving a car.
 From the fact that for all x_4, if x_4 drives a car, then x_4 is a soldier, and that for all x_4, if x_4 were a soldier, then x_4 is a cashier we can infer that for all x_4, if x_4 drives a car, then x_4 is a cashier. From the fact that for all x_4, if x_4 were a cashier, then x_4 is driving a car, and that for all x_4, if x_4 drives a car, then x_4 is a cashier we can infer that for all x_4, x_4 is a cashier if and only if x_4 will drive a car. From the fact that for all x_4, x_4 is a cashier if and only if x_4 will drive a car we can infer that Susan is a cashier if and only if Susan is driving a car. Finally, from the fact that Susan is a cashier if and only if Susan is driving a car we can infer that if Susan were a cashier, then Susan is driving a car. Therefore, the answer is yes.