Consider the following premises. There is at least one y_3 for which if y_3 reads a book, then y_3 is a lawyer. For all y_3, if y_3 were a lawyer, then y_3 is an astronaut. For all y_3, if y_3 makes tea, then y_3 is reading a book. For all y_3, if y_3 were an astronaut, then y_3 is making tea. Can we infer the following from them? There is at least one y_3 for which if y_3 makes tea, then y_3 is a lawyer.
 From the fact that for all y_3, if y_3 were a lawyer, then y_3 is an astronaut, and that for all y_3, if y_3 were an astronaut, then y_3 is making tea we can infer that for all y_3, if y_3 were a lawyer, then y_3 is making tea. Finally, from the fact that for all y_3, if y_3 makes tea, then y_3 is reading a book, and that there is at least one y_3 for which if y_3 reads a book, then y_3 is a lawyer we can infer that there is at least one y_3 for which if y_3 makes tea, then y_3 is a lawyer. Therefore, the answer is yes.