Consider the following premises. Susan is not curious. If Joseph were a nurse, then Susan is curious. If William sleeps, then Joseph is a nurse. William is sleeping if and only if Jessica is a doctor. Can we infer the following from them? Jessica is a doctor.
 From the fact that if Joseph were a nurse, then Susan is curious, and that Susan is not curious we can infer that Joseph is not a nurse. From the fact that if William sleeps, then Joseph is a nurse, and that Joseph is not a nurse we can infer that William is not sleeping. Finally, from the fact that William is sleeping if and only if Jessica is a doctor, and that William is not sleeping we can infer that Jessica is not a doctor, which contradicts that Jessica is a doctor. Therefore, the answer is no.