Consider the following premises. For all x_9, if x_9 were a cashier, then x_9 is a police officer. There is at least one x_9 for which x_9 is a server or x_9 is a cashier. For all x_9, x_9 will sleep. For all x_9, if x_9 were a server, then x_9 is a police officer. Can we infer the following from them? For all x_9, either x_9 will sleep or x_9 is a police officer are not true.
 From the fact that for all x_9, if x_9 were a server, then x_9 is a police officer, that for all x_9, if x_9 were a cashier, then x_9 is a police officer, and that there is at least one x_9 for which x_9 is a server or x_9 is a cashier we can infer that there is at least one x_9 for which x_9 is a police officer. Finally, from the fact that for all x_9, x_9 will sleep, and that there is at least one x_9 for which x_9 is a police officer we can infer that there is at least one x_9 for which x_9 will sleep and x_9 is a police officer, which contradicts that For all x_9, either x_9 will sleep or x_9 is a police officer are not true. Therefore, the answer is no.