Consider the following premises. There is at least one x_10 for which x_10 is a server. For all x_10, if x_10 were a server, then x_10 is a writer. For all x_10, if x_10 were a writer, then x_10 is a police officer. Can we infer the following from them? For all x_10, neither x_10 is a police officer nor x_10 will write a letter.
 From the fact that for all x_10, if x_10 were a server, then x_10 is a writer, and that for all x_10, if x_10 were a writer, then x_10 is a police officer we can infer that for all x_10, if x_10 were a server, then x_10 is a police officer. From the fact that for all x_10, if x_10 were a server, then x_10 is a police officer, and that there is at least one x_10 for which x_10 is a server we can infer that there is at least one x_10 for which x_10 is a police officer. Finally, from the fact that there is at least one x_10 for which x_10 is a police officer we can infer that there is at least one x_10 for which x_10 is a police officer or x_10 will write a letter, which contradicts that For all x_10, neither x_10 is a police officer nor x_10 will write a letter. Therefore, the answer is no.