What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z_3, z_3 will drive a car if and only if z_3 is a writer. Richard is not a writer. Richard is driving a car or Elisabeth is a soldier.
For all z_3, if z_3 drives a car, then z_3 is a writer. For all z_3, if z_3 were a writer, then z_3 is driving a car.