Consider the following premises. For all x_11, x_11 is excited. If Thomas were a doctor, then Richard is listening to a song. For all x_11, x_11 will listen to a song if and only if x_11 will read a book. For all x_11, if x_11 reads a book, then x_11 is not excited. Can we infer the following from them? Thomas is a doctor.
 From the fact that for all x_11, if x_11 reads a book, then x_11 is not excited, and that for all x_11, x_11 is excited we can infer that for all x_11, x_11 will not read a book. From the fact that for all x_11, x_11 will listen to a song if and only if x_11 will read a book, and that for all x_11, x_11 will not read a book we can infer that for all x_11, x_11 will not listen to a song. From the fact that for all x_11, x_11 will not listen to a song we can infer that Richard is not listening to a song. Finally, from the fact that if Thomas were a doctor, then Richard is listening to a song, and that Richard is not listening to a song we can infer that Thomas is not a doctor, which contradicts that Thomas is a doctor. Therefore, the answer is no.