Consider the following premises. For all x_9, if x_9 sleeps, then x_9 is reading a book. For all x_9, if x_9 were a police officer, then x_9 is sleeping. There is at least one x_9 for which x_9 will play a game if and only if x_9 will read a book. Can we infer the following from them? If we can, name the inference rule being used: For all x_9, the fact that x_9 were a police officer does not imply that x_9 is playing a game.
That contradicts the premises. Therefore the answer is no.