Consider the following premises. For all x_5, x_5 is not a poet. For all x_5, x_5 will take a plane or x_5 will write a letter. For all x_5, if x_5 takes a plane, then x_5 is a poet. Can we infer the following from them? There is at least one x_5 for which neither x_5 will write a letter nor x_5 is a soldier.
 From the fact that for all x_5, if x_5 takes a plane, then x_5 is a poet, and that for all x_5, x_5 is not a poet we can infer that for all x_5, x_5 will not take a plane. From the fact that for all x_5, x_5 will take a plane or x_5 will write a letter, and that for all x_5, x_5 will not take a plane we can infer that for all x_5, x_5 will write a letter. Finally, from the fact that for all x_5, x_5 will write a letter we can infer that for all x_5, x_5 will write a letter or x_5 is a soldier, which contradicts that There is at least one x_5 for which neither x_5 will write a letter nor x_5 is a soldier. Therefore, the answer is no.