Consider the following premises. For all x_6, if x_6 were happy, then x_6 is not an electrician. For all x_6, x_6 is happy or x_6 is not a politician. For all x_6, x_6 is an electrician. Can we infer the following from them? For all x_6, x_6 is not a politician.
 From the fact that for all x_6, x_6 is happy or x_6 is not a politician we can infer that for all x_6, if x_6 were a politician, then x_6 is happy. From the fact that for all x_6, if x_6 were happy, then x_6 is not an electrician, and that for all x_6, x_6 is an electrician we can infer that for all x_6, x_6 is not happy. Finally, from the fact that for all x_6, if x_6 were a politician, then x_6 is happy, and that for all x_6, x_6 is not happy we can infer that for all x_6, x_6 is not a politician. Therefore, the answer is yes.