Consider the following premises. For all x_11, x_11 is a janitor. For all x_11, x_11 is not happy or x_11 will make tea. For all x_11, x_11 is happy or x_11 will drink water. For all x_11, x_11 will not drink water. Can we infer the following from them? There is at least one x_11 for which neither x_11 is a janitor nor x_11 is poor.
 From the fact that for all x_11, x_11 is happy or x_11 will drink water, and that for all x_11, x_11 is not happy or x_11 will make tea we can infer that for all x_11, x_11 will drink water or x_11 will make tea. From the fact that for all x_11, x_11 will drink water or x_11 will make tea, and that for all x_11, x_11 will not drink water we can infer that for all x_11, x_11 will make tea. From the fact that for all x_11, x_11 is a janitor, and that for all x_11, x_11 will make tea we can infer that for all x_11, x_11 is a janitor and x_11 will make tea. From the fact that for all x_11, x_11 is a janitor and x_11 will make tea we can infer that for all x_11, x_11 is a janitor. Finally, from the fact that for all x_11, x_11 is a janitor we can infer that for all x_11, x_11 is a janitor or x_11 is poor, which contradicts that There is at least one x_11 for which neither x_11 is a janitor nor x_11 is poor. Therefore, the answer is no.