Consider the following premises. For all x_9, x_9 will listen to a song or x_9 will work. For all x_9, if x_9 were a musician, then x_9 is a writer. For all x_9, x_9 is a musician. For all x_9, x_9 will not listen to a song. Can we infer the following from them? John is a writer.
 From the fact that for all x_9, x_9 will listen to a song or x_9 will work, and that for all x_9, x_9 will not listen to a song we can infer that for all x_9, x_9 will work. From the fact that for all x_9, if x_9 were a musician, then x_9 is a writer, and that for all x_9, x_9 is a musician we can infer that for all x_9, x_9 is a writer. From the fact that for all x_9, x_9 will work, and that for all x_9, x_9 is a writer we can infer that for all x_9, x_9 will work and x_9 is a writer. From the fact that for all x_9, x_9 will work and x_9 is a writer we can infer that John is working and John is a writer. Finally, from the fact that John is working and John is a writer we can infer that John is a writer. Therefore, the answer is yes.