Consider the following premises. For all x_8, x_8 will take a plane or x_8 will cook. For all x_8, x_8 will take a plane if and only if x_8 will play squash. For all x_8, x_8 will not play squash. For all x_8, x_8 will drink water. Can we infer the following from them? There is at least one x_8 for which either x_8 will drink water or x_8 will cook are not true.
 From the fact that for all x_8, x_8 will take a plane if and only if x_8 will play squash, and that for all x_8, x_8 will not play squash we can infer that for all x_8, x_8 will not take a plane. From the fact that for all x_8, x_8 will take a plane or x_8 will cook, and that for all x_8, x_8 will not take a plane we can infer that for all x_8, x_8 will cook. Finally, from the fact that for all x_8, x_8 will drink water, and that for all x_8, x_8 will cook we can infer that for all x_8, x_8 will drink water and x_8 will cook, which contradicts that There is at least one x_8 for which either x_8 will drink water or x_8 will cook are not true. Therefore, the answer is no.