Consider the following premises. For all x_9, x_9 will make tea if and only if x_9 will play tennis. There is at least one x_9 for which if x_9 were a police officer, then x_9 is a sailor. For all x_9, x_9 will make tea. For all x_9, if x_9 plays tennis, then x_9 is a sailor. Can we infer the following from them? For all x_9, x_9 is not a sailor.
 From the fact that for all x_9, x_9 will make tea if and only if x_9 will play tennis we can infer that for all x_9, if x_9 makes tea, then x_9 is playing tennis. From the fact that for all x_9, if x_9 makes tea, then x_9 is playing tennis, and that for all x_9, x_9 will make tea we can infer that for all x_9, x_9 will play tennis. From the fact that for all x_9, x_9 will play tennis we can infer that for all x_9, x_9 will play tennis or x_9 is a police officer. Finally, from the fact that for all x_9, if x_9 plays tennis, then x_9 is a sailor, that there is at least one x_9 for which if x_9 were a police officer, then x_9 is a sailor, and that for all x_9, x_9 will play tennis or x_9 is a police officer we can infer that there is at least one x_9 for which x_9 is a sailor, which contradicts that For all x_9, x_9 is not a sailor. Therefore, the answer is no.