Consider the following premises. For all x_6, if x_6 were a nurse, then x_6 is drinking water. There is at least one x_6 for which x_6 will play squash. For all x_6, x_6 is a taxi driver or x_6 is a nurse. For all x_6, if x_6 were a taxi driver, then x_6 is drinking water. Can we infer the following from them? For all x_6, x_6 will not play squash.
 From the fact that for all x_6, if x_6 were a taxi driver, then x_6 is drinking water, that for all x_6, if x_6 were a nurse, then x_6 is drinking water, and that for all x_6, x_6 is a taxi driver or x_6 is a nurse we can infer that for all x_6, x_6 will drink water. From the fact that there is at least one x_6 for which x_6 will play squash, and that for all x_6, x_6 will drink water we can infer that there is at least one x_6 for which x_6 will play squash and x_6 will drink water. Finally, from the fact that there is at least one x_6 for which x_6 will play squash and x_6 will drink water we can infer that there is at least one x_6 for which x_6 will play squash, which contradicts that For all x_6, x_6 will not play squash. Therefore, the answer is no.