Consider the following premises. For all x_9, x_9 will not take a plane. For all x_9, if x_9 writes a letter, then x_9 is taking a plane. For all x_9, if x_9 reads a book, then x_9 is writing a letter. There is at least one x_9 for which x_9 will read a book or x_9 will not take a plane. Can we infer the following from them? For all x_9, x_9 will read a book.
 From the fact that there is at least one x_9 for which x_9 will read a book or x_9 will not take a plane we can infer that there is at least one x_9 for which if x_9 takes a plane, then x_9 is reading a book. From the fact that for all x_9, if x_9 reads a book, then x_9 is writing a letter, and that for all x_9, if x_9 writes a letter, then x_9 is taking a plane we can infer that for all x_9, if x_9 reads a book, then x_9 is taking a plane. From the fact that there is at least one x_9 for which if x_9 takes a plane, then x_9 is reading a book, and that for all x_9, if x_9 reads a book, then x_9 is taking a plane we can infer that there is at least one x_9 for which x_9 will take a plane if and only if x_9 will read a book. Finally, from the fact that there is at least one x_9 for which x_9 will take a plane if and only if x_9 will read a book, and that for all x_9, x_9 will not take a plane we can infer that there is at least one x_9 for which x_9 will not read a book, which contradicts that For all x_9, x_9 will read a book. Therefore, the answer is no.