Consider the following premises. David is playing squash if and only if Jennifer is an artist. David is not playing squash. Sarah is driving a car if and only if Jennifer is an artist. If Jennifer were an artist, then Sarah is driving a car. Can we infer the following from them? Sarah is driving a car.
 From the fact that Sarah is driving a car if and only if Jennifer is an artist we can infer that if Sarah drives a car, then Jennifer is an artist. From the fact that if Sarah drives a car, then Jennifer is an artist, and that if Jennifer were an artist, then Sarah is driving a car we can infer that Sarah is driving a car if and only if Jennifer is an artist. From the fact that David is playing squash if and only if Jennifer is an artist, and that David is not playing squash we can infer that Jennifer is not an artist. Finally, from the fact that Sarah is driving a car if and only if Jennifer is an artist, and that Jennifer is not an artist we can infer that Sarah is not driving a car, which contradicts that Sarah is driving a car. Therefore, the answer is no.