Consider the following premises. For all x_8, x_8 is a police officer or x_8 is a politician. For all x_8, x_8 will drink water or x_8 is not a politician. There is at least one x_8 for which x_8 is a police officer if and only if x_8 will drink water. Can we infer the following from them? For all x_8, x_8 will not drink water.
 From the fact that there is at least one x_8 for which x_8 is a police officer if and only if x_8 will drink water we can infer that there is at least one x_8 for which if x_8 were a police officer, then x_8 is drinking water. From the fact that for all x_8, x_8 will drink water or x_8 is not a politician we can infer that for all x_8, if x_8 were a politician, then x_8 is drinking water. Finally, from the fact that there is at least one x_8 for which if x_8 were a police officer, then x_8 is drinking water, that for all x_8, if x_8 were a politician, then x_8 is drinking water, and that for all x_8, x_8 is a police officer or x_8 is a politician we can infer that there is at least one x_8 for which x_8 will drink water, which contradicts that For all x_8, x_8 will not drink water. Therefore, the answer is no.