Consider the following premises. There is at least one x_5 for which x_5 is a doctor or x_5 is a nurse. For all x_5, if x_5 were a doctor, then x_5 is a server. For all x_5, if x_5 were a server, then x_5 is a doctor. For all x_5, if x_5 were a nurse, then x_5 is a server. Can we infer the following from them? For all x_5, x_5 is not a server.
 From the fact that for all x_5, if x_5 were a doctor, then x_5 is a server, and that for all x_5, if x_5 were a server, then x_5 is a doctor we can infer that for all x_5, x_5 is a doctor if and only if x_5 is a server. From the fact that for all x_5, x_5 is a doctor if and only if x_5 is a server we can infer that for all x_5, if x_5 were a doctor, then x_5 is a server. Finally, from the fact that for all x_5, if x_5 were a doctor, then x_5 is a server, that for all x_5, if x_5 were a nurse, then x_5 is a server, and that there is at least one x_5 for which x_5 is a doctor or x_5 is a nurse we can infer that there is at least one x_5 for which x_5 is a server, which contradicts that For all x_5, x_5 is not a server. Therefore, the answer is no.