Consider the following premises. For all x_7, x_7 will read a book. For all x_7, if x_7 reads a book, then x_7 is a writer. For all x_7, if x_7 were a police officer, then x_7 is a writer. For all x_7, if x_7 were a writer, then x_7 is reading a book. Can we infer the following from them? For all x_7, x_7 is a writer.
 From the fact that for all x_7, if x_7 were a writer, then x_7 is reading a book, and that for all x_7, if x_7 reads a book, then x_7 is a writer we can infer that for all x_7, x_7 is a writer if and only if x_7 will read a book. From the fact that for all x_7, x_7 will read a book we can infer that for all x_7, x_7 will read a book or x_7 is a police officer. From the fact that for all x_7, x_7 is a writer if and only if x_7 will read a book we can infer that for all x_7, if x_7 reads a book, then x_7 is a writer. Finally, from the fact that for all x_7, if x_7 reads a book, then x_7 is a writer, that for all x_7, if x_7 were a police officer, then x_7 is a writer, and that for all x_7, x_7 will read a book or x_7 is a police officer we can infer that for all x_7, x_7 is a writer. Therefore, the answer is yes.