Consider the following premises. For all x_9, x_9 will work. For all x_9, if x_9 works, then x_9 is a mechanic. For all x_9, if x_9 were a mechanic, then x_9 is working. Can we infer the following from them? For all x_9, x_9 is a mechanic or x_9 will read a book.
 From the fact that for all x_9, if x_9 works, then x_9 is a mechanic, and that for all x_9, if x_9 were a mechanic, then x_9 is working we can infer that for all x_9, x_9 will work if and only if x_9 is a mechanic. From the fact that for all x_9, x_9 will work if and only if x_9 is a mechanic we can infer that for all x_9, if x_9 works, then x_9 is a mechanic. From the fact that for all x_9, if x_9 works, then x_9 is a mechanic, and that for all x_9, x_9 will work we can infer that for all x_9, x_9 is a mechanic. Finally, from the fact that for all x_9, x_9 is a mechanic we can infer that for all x_9, x_9 is a mechanic or x_9 will read a book. Therefore, the answer is yes.