Consider the following premises. For all y_3, y_3 is bored or y_3 is not an electrician. Barbara is not bored. Can we infer the following from them? Barbara is an electrician.
 From the fact that for all y_3, y_3 is bored or y_3 is not an electrician we can infer that for all y_3, if y_3 were an electrician, then y_3 is bored. From the fact that for all y_3, if y_3 were an electrician, then y_3 is bored we can infer that if Barbara were an electrician, then Barbara is bored. Finally, from the fact that if Barbara were an electrician, then Barbara is bored, and that Barbara is not bored we can infer that Barbara is not an electrician, which contradicts that Barbara is an electrician. Therefore, the answer is no.