Consider the following premises. For all x_7, x_7 will sleep. For all x_7, x_7 will not drink water. For all x_7, x_7 will not sleep or x_7 is a police officer. There is at least one x_7 for which x_7 is a writer. Can we infer the following from them? For all x_7, either x_7 is a writer or x_7 is a police officer are not true.
 From the fact that for all x_7, x_7 will sleep we can infer that for all x_7, x_7 will sleep or x_7 will drink water. From the fact that for all x_7, x_7 will sleep or x_7 will drink water, and that for all x_7, x_7 will not sleep or x_7 is a police officer we can infer that for all x_7, x_7 will drink water or x_7 is a police officer. From the fact that for all x_7, x_7 will drink water or x_7 is a police officer, and that for all x_7, x_7 will not drink water we can infer that for all x_7, x_7 is a police officer. Finally, from the fact that there is at least one x_7 for which x_7 is a writer, and that for all x_7, x_7 is a police officer we can infer that there is at least one x_7 for which x_7 is a writer and x_7 is a police officer, which contradicts that For all x_7, either x_7 is a writer or x_7 is a police officer are not true. Therefore, the answer is no.