Consider the following premises. It is overcast or Susan is driving a car. It is not overcast. Richard is a musician if and only if Susan is driving a car. Can we infer the following from them? Richard is not a musician.
 From the fact that Richard is a musician if and only if Susan is driving a car we can infer that if Susan drives a car, then Richard is a musician. From the fact that it is overcast or Susan is driving a car, and that it is not overcast we can infer that Susan is driving a car. Finally, from the fact that if Susan drives a car, then Richard is a musician, and that Susan is driving a car we can infer that Richard is a musician, which contradicts that Richard is not a musician. Therefore, the answer is no.