Consider the following premises. For all x_5, x_5 is a doctor. There is at least one x_5 for which x_5 will not play tennis. For all x_5, x_5 will play tennis or x_5 will take a plane. Can we infer the following from them? For all x_5, either x_5 will take a plane or x_5 is a doctor are not true.
 From the fact that for all x_5, x_5 will play tennis or x_5 will take a plane, and that there is at least one x_5 for which x_5 will not play tennis we can infer that there is at least one x_5 for which x_5 will take a plane. Finally, from the fact that there is at least one x_5 for which x_5 will take a plane, and that for all x_5, x_5 is a doctor we can infer that there is at least one x_5 for which x_5 will take a plane and x_5 is a doctor, which contradicts that For all x_5, either x_5 will take a plane or x_5 is a doctor are not true. Therefore, the answer is no.