Consider the following premises. There is at least one z_3 for which z_3 will not read a book. For all z_3, z_3 is a soldier or z_3 will not read a book. For all z_3, if z_3 were a soldier, then z_3 is reading a book. Can we infer the following from them? For all z_3, z_3 is a soldier.
 From the fact that for all z_3, z_3 is a soldier or z_3 will not read a book we can infer that for all z_3, if z_3 reads a book, then z_3 is a soldier. From the fact that for all z_3, if z_3 were a soldier, then z_3 is reading a book, and that for all z_3, if z_3 reads a book, then z_3 is a soldier we can infer that for all z_3, z_3 is a soldier if and only if z_3 will read a book. Finally, from the fact that for all z_3, z_3 is a soldier if and only if z_3 will read a book, and that there is at least one z_3 for which z_3 will not read a book we can infer that there is at least one z_3 for which z_3 is not a soldier, which contradicts that For all z_3, z_3 is a soldier. Therefore, the answer is no.