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