Consider the following premises. For all x_9, x_9 is curious if and only if x_9 is a nurse. For all x_9, x_9 is not curious. For all x_9, if x_9 were curious, then x_9 is a nurse. Can we infer the following from them? For all x_9, x_9 is not a nurse.
 From the fact that for all x_9, x_9 is curious if and only if x_9 is a nurse we can infer that for all x_9, if x_9 were a nurse, then x_9 is curious. From the fact that for all x_9, if x_9 were a nurse, then x_9 is curious, and that for all x_9, if x_9 were curious, then x_9 is a nurse we can infer that for all x_9, x_9 is a nurse if and only if x_9 is curious. From the fact that for all x_9, x_9 is a nurse if and only if x_9 is curious we can infer that for all x_9, if x_9 were a nurse, then x_9 is curious. Finally, from the fact that for all x_9, if x_9 were a nurse, then x_9 is curious, and that for all x_9, x_9 is not curious we can infer that for all x_9, x_9 is not a nurse. Therefore, the answer is yes.