Consider the following premises. For all x_4, x_4 will sleep or x_4 is a server. For all x_4, if x_4 were a server, then x_4 is drinking water. For all x_4, x_4 will work. For all x_4, if x_4 sleeps, then x_4 is drinking water. Can we infer the following from them? There is at least one x_4 for which either x_4 will work or x_4 will drink water are not true.
 From the fact that for all x_4, if x_4 sleeps, then x_4 is drinking water, that for all x_4, if x_4 were a server, then x_4 is drinking water, and that for all x_4, x_4 will sleep or x_4 is a server we can infer that for all x_4, x_4 will drink water. Finally, from the fact that for all x_4, x_4 will work, and that for all x_4, x_4 will drink water we can infer that for all x_4, x_4 will work and x_4 will drink water, which contradicts that There is at least one x_4 for which either x_4 will work or x_4 will drink water are not true. Therefore, the answer is no.