Consider the following premises. Jennifer is a politician. For all z_4, if z_4 makes tea, then z_4 is reading a book. Thomas is not making tea. For all z_4, if z_4 reads a book, then z_4 is making tea. Can we infer the following from them? If we can, name the inference rule being used: Jennifer is a politician and Thomas is not reading a book.
 From the fact that for all z_4, if z_4 reads a book, then z_4 is making tea, and that for all z_4, if z_4 makes tea, then z_4 is reading a book we can infer that for all z_4, z_4 will read a book if and only if z_4 will make tea via universal biconditional introduction. From the fact that for all z_4, z_4 will read a book if and only if z_4 will make tea we can infer that Thomas is reading a book if and only if Thomas is making tea via universal instantiation. From the fact that Thomas is reading a book if and only if Thomas is making tea, and that Thomas is not making tea we can infer that Thomas is not reading a book via biconditional elimination. Finally, from the fact that Jennifer is a politician, and that Thomas is not reading a book we can infer that Jennifer is a politician and Thomas is not reading a book via conjunction. Therefore, the answer is yes.