What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_6 for which if x_6 drives a car, then x_6 is an astronaut. For all x_6, if x_6 were an astronaut, then x_6 is not taking a plane. For all x_6, x_6 will take a plane. For all x_6, if x_6 were an astronaut, then x_6 is driving a car.
For all x_6, x_6 is not an astronaut. There is at least one x_6 for which x_6 will drive a car if and only if x_6 is an astronaut. There is at least one x_6 for which x_6 is an astronaut if and only if x_6 will drive a car.