Consider the following premises. For all x_10, if x_10 reads a book, then x_10 is a cashier. There is at least one x_10 for which x_10 is not a cashier. For all x_10, x_10 is a janitor or x_10 is an electrician. For all x_10, x_10 is a janitor if and only if x_10 will read a book. Can we infer the following from them? There is at least one x_10 for which x_10 is an electrician.
 From the fact that for all x_10, if x_10 reads a book, then x_10 is a cashier, and that there is at least one x_10 for which x_10 is not a cashier we can infer that there is at least one x_10 for which x_10 will not read a book. From the fact that for all x_10, x_10 is a janitor if and only if x_10 will read a book, and that there is at least one x_10 for which x_10 will not read a book we can infer that there is at least one x_10 for which x_10 is not a janitor. Finally, from the fact that for all x_10, x_10 is a janitor or x_10 is an electrician, and that there is at least one x_10 for which x_10 is not a janitor we can infer that there is at least one x_10 for which x_10 is an electrician. Therefore, the answer is yes.