What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, x_5 is not a writer. For all x_5, if x_5 drives a car, then x_5 is a writer. For all x_5, x_5 will sleep if and only if x_5 will drive a car.
For all x_5, x_5 will not drive a car. For all x_5, if x_5 sleeps, then x_5 is driving a car. For all x_5, if x_5 drives a car, then x_5 is sleeping.