Consider the following premises. For all x_9, x_9 is a doctor. For all x_9, x_9 will play tennis. For all x_9, x_9 will sleep or x_9 is a server. For all x_9, if x_9 sleeps, then x_9 is not a doctor. Can we infer the following from them? There is at least one x_9 for which x_9 is not a server.
 From the fact that for all x_9, x_9 is a doctor, and that for all x_9, x_9 will play tennis we can infer that for all x_9, x_9 is a doctor and x_9 will play tennis. From the fact that for all x_9, x_9 is a doctor and x_9 will play tennis we can infer that for all x_9, x_9 is a doctor. From the fact that for all x_9, if x_9 sleeps, then x_9 is not a doctor, and that for all x_9, x_9 is a doctor we can infer that for all x_9, x_9 will not sleep. Finally, from the fact that for all x_9, x_9 will sleep or x_9 is a server, and that for all x_9, x_9 will not sleep we can infer that for all x_9, x_9 is a server, which contradicts that There is at least one x_9 for which x_9 is not a server. Therefore, the answer is no.