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_12 for which if x_12 drives a car, then x_12 is not sad. For all x_12, x_12 is sad. For all x_12, if x_12 were a soldier, then x_12 is a scientist. For all x_12, x_12 will drive a car or x_12 is a soldier.
There is at least one x_12 for which x_12 will not drive a car.