What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 plays tennis, then x_6 is a soldier. For all x_6, x_6 will drive a car or x_6 is not a soldier. For all x_6, x_6 will play tennis or x_6 will take a plane. For all x_6, if x_6 takes a plane, then x_6 is driving a car.
For all x_6, if x_6 were a soldier, then x_6 is driving a car.