Consider the following premises. For all x_15, if x_15 were a doctor, then x_15 is taking a plane. For all x_15, x_15 will listen to a song. For all x_15, if x_15 listens to a song, then x_15 is reading a book. For all x_15, if x_15 were excited, then x_15 is taking a plane. There is at least one x_15 for which x_15 is a doctor or x_15 is excited. Can we infer the following from them? There is at least one x_15 for which x_15 will read a book.
 From the fact that for all x_15, if x_15 were a doctor, then x_15 is taking a plane, that for all x_15, if x_15 were excited, then x_15 is taking a plane, and that there is at least one x_15 for which x_15 is a doctor or x_15 is excited we can infer that there is at least one x_15 for which x_15 will take a plane. From the fact that for all x_15, if x_15 listens to a song, then x_15 is reading a book, and that for all x_15, x_15 will listen to a song we can infer that for all x_15, x_15 will read a book. From the fact that for all x_15, x_15 will read a book, and that there is at least one x_15 for which x_15 will take a plane we can infer that there is at least one x_15 for which x_15 will read a book and x_15 will take a plane. Finally, from the fact that there is at least one x_15 for which x_15 will read a book and x_15 will take a plane we can infer that there is at least one x_15 for which x_15 will read a book. Therefore, the answer is yes.