Consider the following premises. For all x_2, x_2 is not an electrician. For all x_2, x_2 is an electrician or x_2 is a doctor. For all x_2, x_2 will take a plane. Can we infer the following from them? If we can, name the inference rule being used: For all x_2, x_2 will take a plane and x_2 is a doctor.
 From the fact that for all x_2, x_2 is an electrician or x_2 is a doctor, and that for all x_2, x_2 is not an electrician we can infer that for all x_2, x_2 is a doctor via universal disjunctive syllogism. Finally, from the fact that for all x_2, x_2 will take a plane, and that for all x_2, x_2 is a doctor we can infer that for all x_2, x_2 will take a plane and x_2 is a doctor via universal conjunction. Therefore, the answer is yes.