Consider the following premises. For all x_6, x_6 is an astronaut or x_6 is a soldier. For all x_6, x_6 will take a plane if and only if x_6 will drive a car. For all x_6, x_6 is not an astronaut or x_6 will take a plane. For all x_6, if x_6 were a soldier, then x_6 is driving a car. Can we infer the following from them? If we can, name the inference rule being used: For all x_6, x_6 will drive a car.
 From the fact that for all x_6, x_6 is an astronaut or x_6 is a soldier, and that for all x_6, x_6 is not an astronaut or x_6 will take a plane we can infer that for all x_6, x_6 is a soldier or x_6 will take a plane via universal resolution. From the fact that for all x_6, x_6 will take a plane if and only if x_6 will drive a car we can infer that for all x_6, if x_6 takes a plane, then x_6 is driving a car via universal biconditional elimination. Finally, from the fact that for all x_6, if x_6 were a soldier, then x_6 is driving a car, that for all x_6, if x_6 takes a plane, then x_6 is driving a car, and that for all x_6, x_6 is a soldier or x_6 will take a plane we can infer that for all x_6, x_6 will drive a car via universal disjunction elimination. Therefore, the answer is yes.