Consider the following premises. For all z, z will read a book if and only if z will drive a car. For all z, z will read a book if and only if z will make tea. Can we infer the following from them? If we can, name the inference rule being used: For all z, if z makes tea, then z is driving a car.
 From the fact that for all z, z will read a book if and only if z will drive a car we can infer that for all z, if z reads a book, then z is driving a car via universal biconditional elimination. From the fact that for all z, z will read a book if and only if z will make tea we can infer that for all z, if z makes tea, then z is reading a book via universal biconditional elimination. Finally, from the fact that for all z, if z makes tea, then z is reading a book, and that for all z, if z reads a book, then z is driving a car we can infer that for all z, if z makes tea, then z is driving a car via universal transitivity. Therefore, the answer is yes.