Consider the following premises. If James were a doctor, then Sarah is a server. If Jennifer climbs a mountain, then James is a doctor. Sarah is a server or James is not working. Jennifer is climbing a mountain or it is not overcast. It is overcast or James is working. Can we infer the following from them? Sarah is not a server.
 From the fact that Sarah is a server or James is not working we can infer that if James works, then Sarah is a server. From the fact that Jennifer is climbing a mountain or it is not overcast we can infer that if it is overcast, then Jennifer is climbing a mountain. From the fact that if it is overcast, then Jennifer is climbing a mountain, and that if Jennifer climbs a mountain, then James is a doctor we can infer that if it is overcast, then James is a doctor. From the fact that if it is overcast, then James is a doctor, and that if James were a doctor, then Sarah is a server we can infer that if it is overcast, then Sarah is a server. Finally, from the fact that if it is overcast, then Sarah is a server, that if James works, then Sarah is a server, and that it is overcast or James is working we can infer that Sarah is a server, which contradicts that Sarah is not a server. Therefore, the answer is no.