Consider the following premises. For all x, x will not read a book. For all x, if x goes running, then x is reading a book. For all x, if x were a taxi driver, then x is running. Can we infer the following from them? For all x, x is not a taxi driver.
 From the fact that for all x, if x were a taxi driver, then x is running, and that for all x, if x goes running, then x is reading a book we can infer that for all x, if x were a taxi driver, then x is reading a book. Finally, from the fact that for all x, if x were a taxi driver, then x is reading a book, and that for all x, x will not read a book we can infer that for all x, x is not a taxi driver. Therefore, the answer is yes.