What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Jennifer is driving a car if and only if William is sleeping. If William sleeps, then Thomas is happy. If Thomas were happy, then Jennifer is driving a car.
If William sleeps, then Jennifer is driving a car. If Jennifer drives a car, then William is sleeping. If William sleeps, then Jennifer is driving a car.