Consider the following premises. For all x_6, x_6 will play tennis or x_6 will not cook. For all x_6, x_6 will cook. There is at least one x_6 for which if x_6 plays tennis, then x_6 is taking a plane. Can we infer the following from them? For all x_6, x_6 will not take a plane.
 From the fact that for all x_6, x_6 will play tennis or x_6 will not cook we can infer that for all x_6, if x_6 cooks, then x_6 is playing tennis. From the fact that for all x_6, if x_6 cooks, then x_6 is playing tennis, and that for all x_6, x_6 will cook we can infer that for all x_6, x_6 will play tennis. Finally, from the fact that there is at least one x_6 for which if x_6 plays tennis, then x_6 is taking a plane, and that for all x_6, x_6 will play tennis we can infer that there is at least one x_6 for which x_6 will take a plane, which contradicts that For all x_6, x_6 will not take a plane. Therefore, the answer is no.