Consider the following premises. For all x_2, x_2 is a soldier or x_2 is not an electrician. For all x_2, if x_2 were a soldier, then x_2 is taking a plane. Can we infer the following from them? If we can, name the inference rule being used: There is at least one x_2 for which the fact that x_2 were an electrician does not imply that x_2 is taking a plane.
 From the fact that for all x_2, x_2 is a soldier or x_2 is not an electrician we can infer that for all x_2, if x_2 were an electrician, then x_2 is a soldier via universal rewriting. Finally, from the fact that for all x_2, if x_2 were an electrician, then x_2 is a soldier, and that for all x_2, if x_2 were a soldier, then x_2 is taking a plane we can infer that for all x_2, if x_2 were an electrician, then x_2 is taking a plane via universal transitivity, which contradicts that There is at least one x_2 for which the fact that x_2 were an electrician does not imply that x_2 is taking a plane. Therefore, the answer is no.