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