Consider the following premises. For all x_8, x_8 will climb a mountain or x_8 is a sailor. For all x_8, x_8 is not a police officer. For all x_8, x_8 will climb a mountain if and only if x_8 is a police officer. There is at least one x_8 for which x_8 will play squash. Can we infer the following from them? For all x_8, either x_8 will play squash or x_8 is a sailor are not true.
 From the fact that for all x_8, x_8 will climb a mountain if and only if x_8 is a police officer, and that for all x_8, x_8 is not a police officer we can infer that for all x_8, x_8 will not climb a mountain. From the fact that for all x_8, x_8 will climb a mountain or x_8 is a sailor, and that for all x_8, x_8 will not climb a mountain we can infer that for all x_8, x_8 is a sailor. Finally, from the fact that there is at least one x_8 for which x_8 will play squash, and that for all x_8, x_8 is a sailor we can infer that there is at least one x_8 for which x_8 will play squash and x_8 is a sailor, which contradicts that For all x_8, either x_8 will play squash or x_8 is a sailor are not true. Therefore, the answer is no.