Consider the following premises. For all x_8, x_8 is excited if and only if x_8 is bored. For all x_8, x_8 is bored if and only if x_8 is sad. For all x_8, x_8 is not sad. There is at least one x_8 for which if x_8 were an electrician, then x_8 is excited. Can we infer the following from them? There is at least one x_8 for which x_8 is not an electrician.
 From the fact that for all x_8, x_8 is bored if and only if x_8 is sad, and that for all x_8, x_8 is not sad we can infer that for all x_8, x_8 is not bored. From the fact that for all x_8, x_8 is excited if and only if x_8 is bored, and that for all x_8, x_8 is not bored we can infer that for all x_8, x_8 is not excited. Finally, from the fact that there is at least one x_8 for which if x_8 were an electrician, then x_8 is excited, and that for all x_8, x_8 is not excited we can infer that there is at least one x_8 for which x_8 is not an electrician. Therefore, the answer is yes.