What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 will not drive a car. For all x_9, x_9 is an electrician or x_9 will play squash. For all x_9, x_9 is an electrician if and only if x_9 will drive a car.
For all x_9, if x_9 were an electrician, then x_9 is driving a car. For all x_9, if x_9 drives a car, then x_9 is an electrician. For all x_9, x_9 is not an electrician.