Consider the following premises. For all x_5, if x_5 reads a book, then x_5 is playing a game. For all x_5, if x_5 plays a game, then x_5 is a janitor. For all x_5, x_5 will read a book and x_5 will drink water. Can we infer the following from them? There is at least one x_5 for which x_5 is not a janitor.
 From the fact that for all x_5, if x_5 reads a book, then x_5 is playing a game, and that for all x_5, if x_5 plays a game, then x_5 is a janitor we can infer that for all x_5, if x_5 reads a book, then x_5 is a janitor. From the fact that for all x_5, x_5 will read a book and x_5 will drink water we can infer that for all x_5, x_5 will read a book. Finally, from the fact that for all x_5, if x_5 reads a book, then x_5 is a janitor, and that for all x_5, x_5 will read a book we can infer that for all x_5, x_5 is a janitor, which contradicts that There is at least one x_5 for which x_5 is not a janitor. Therefore, the answer is no.