Consider the following premises. For all x_10, if x_10 were a soldier, then x_10 is sleeping. For all x_10, if x_10 sleeps, then x_10 is not taking a plane. For all x_10, if x_10 sleeps, then x_10 is a janitor. For all x_10, x_10 will take a plane. For all x_10, if x_10 drives a car, then x_10 is a soldier. For all x_10, if x_10 were a janitor, then x_10 is driving a car. Can we infer the following from them? There is at least one x_10 for which x_10 is a soldier.
 From the fact that for all x_10, if x_10 sleeps, then x_10 is a janitor, and that for all x_10, if x_10 were a janitor, then x_10 is driving a car we can infer that for all x_10, if x_10 sleeps, then x_10 is driving a car. From the fact that for all x_10, if x_10 sleeps, then x_10 is driving a car, and that for all x_10, if x_10 drives a car, then x_10 is a soldier we can infer that for all x_10, if x_10 sleeps, then x_10 is a soldier. From the fact that for all x_10, if x_10 sleeps, then x_10 is not taking a plane, and that for all x_10, x_10 will take a plane we can infer that for all x_10, x_10 will not sleep. From the fact that for all x_10, if x_10 sleeps, then x_10 is a soldier, and that for all x_10, if x_10 were a soldier, then x_10 is sleeping we can infer that for all x_10, x_10 will sleep if and only if x_10 is a soldier. Finally, from the fact that for all x_10, x_10 will sleep if and only if x_10 is a soldier, and that for all x_10, x_10 will not sleep we can infer that for all x_10, x_10 is not a soldier, which contradicts that There is at least one x_10 for which x_10 is a soldier. Therefore, the answer is no.