What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_2, if x_2 drives a car, then x_2 is a musician. For all x_2, x_2 is a writer if and only if x_2 will drive a car. There is at least one x_2 for which x_2 is not a musician.
There is at least one x_2 for which x_2 will not drive a car. For all x_2, if x_2 were a writer, then x_2 is driving a car. For all x_2, if x_2 drives a car, then x_2 is a writer.