Consider the following premises. There is at least one x_6 for which if x_6 reads a book, then x_6 is a bartender. For all x_6, x_6 is not an electrician. For all x_6, if x_6 were an electrician, then x_6 is reading a book. For all x_6, if x_6 reads a book, then x_6 is an electrician. For all x_6, if x_6 were a bartender, then x_6 is reading a book. Can we infer the following from them? There is at least one x_6 for which x_6 is not a bartender.
 From the fact that there is at least one x_6 for which if x_6 reads a book, then x_6 is a bartender, and that for all x_6, if x_6 were a bartender, then x_6 is reading a book we can infer that there is at least one x_6 for which x_6 will read a book if and only if x_6 is a bartender. From the fact that for all x_6, if x_6 reads a book, then x_6 is an electrician, and that for all x_6, if x_6 were an electrician, then x_6 is reading a book we can infer that for all x_6, x_6 will read a book if and only if x_6 is an electrician. From the fact that for all x_6, x_6 will read a book if and only if x_6 is an electrician, and that for all x_6, x_6 is not an electrician we can infer that for all x_6, x_6 will not read a book. Finally, from the fact that there is at least one x_6 for which x_6 will read a book if and only if x_6 is a bartender, and that for all x_6, x_6 will not read a book we can infer that there is at least one x_6 for which x_6 is not a bartender. Therefore, the answer is yes.