What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_2, y_2 will drive a car if and only if y_2 is an artist. There is at least one y_2 for which y_2 is not an artist. For all y_2, y_2 will drive a car if and only if y_2 is a musician.
For all y_2, if y_2 drives a car, then y_2 is an artist. For all y_2, if y_2 drives a car, then y_2 is a musician. For all y_2, if y_2 were an artist, then y_2 is driving a car. For all y_2, if y_2 were a musician, then y_2 is driving a car. There is at least one y_2 for which y_2 will not drive a car.