Consider the following premises. For all x_6, x_6 will play tennis. There is at least one x_6 for which if x_6 plays tennis, then x_6 is excited. For all x_6, x_6 is excited if and only if x_6 is a police officer. Can we infer the following from them? For all x_6, x_6 is not excited.
 From the fact that for all x_6, x_6 is excited if and only if x_6 is a police officer we can infer that for all x_6, if x_6 were a police officer, then x_6 is excited. From the fact that for all x_6, x_6 will play tennis we can infer that for all x_6, x_6 will play tennis or x_6 is a police officer. Finally, from the fact that there is at least one x_6 for which if x_6 plays tennis, then x_6 is excited, that for all x_6, if x_6 were a police officer, then x_6 is excited, and that for all x_6, x_6 will play tennis or x_6 is a police officer we can infer that there is at least one x_6 for which x_6 is excited, which contradicts that For all x_6, x_6 is not excited. Therefore, the answer is no.