Consider the following premises. Karen is a taxi driver if and only if Jennifer is a carpenter. For all x_6, x_6 will not read a book. For all x_6, if x_6 were a taxi driver, then x_6 is reading a book. Can we infer the following from them? Jennifer is not a carpenter.
 From the fact that for all x_6, if x_6 were a taxi driver, then x_6 is reading a book, and that for all x_6, x_6 will not read a book we can infer that for all x_6, x_6 is not a taxi driver. From the fact that for all x_6, x_6 is not a taxi driver we can infer that Karen is not a taxi driver. Finally, from the fact that Karen is a taxi driver if and only if Jennifer is a carpenter, and that Karen is not a taxi driver we can infer that Jennifer is not a carpenter. Therefore, the answer is yes.