Consider the following premises. For all x_16, x_16 will drink water or x_16 will not sleep. For all x_16, if x_16 were a server, then x_16 is drinking water. For all x_16, if x_16 drinks water, then x_16 is a server. There is at least one x_16 for which x_16 will sleep. Can we infer the following from them? There is at least one x_16 for which x_16 is a server.
 From the fact that for all x_16, x_16 will drink water or x_16 will not sleep we can infer that for all x_16, if x_16 sleeps, then x_16 is drinking water. From the fact that for all x_16, if x_16 were a server, then x_16 is drinking water, and that for all x_16, if x_16 drinks water, then x_16 is a server we can infer that for all x_16, x_16 is a server if and only if x_16 will drink water. From the fact that for all x_16, x_16 is a server if and only if x_16 will drink water we can infer that for all x_16, if x_16 drinks water, then x_16 is a server. From the fact that for all x_16, if x_16 sleeps, then x_16 is drinking water, and that there is at least one x_16 for which x_16 will sleep we can infer that there is at least one x_16 for which x_16 will drink water. Finally, from the fact that for all x_16, if x_16 drinks water, then x_16 is a server, and that there is at least one x_16 for which x_16 will drink water we can infer that there is at least one x_16 for which x_16 is a server. Therefore, the answer is yes.