Consider the following premises. For all z_3, z_3 is a politician. For all x_25, x_25 will work if and only if x_25 will read a book. For all x_25, x_25 will work. Can we infer the following from them? If we can, name the inference rule being used: For all x_25, x_25 will work if and only if x_25 will read a book.
That is one of the premises. Therefore, the answer is yes.