Consider the following premises. For all x_9, if x_9 plays squash, then x_9 is not drinking water. For all x_9, x_9 will drink water. There is at least one x_9 for which x_9 will take a plane if and only if x_9 will play squash. For all x_9, x_9 is a bartender. Can we infer the following from them? For all x_9, x_9 will take a plane.
 From the fact that for all x_9, x_9 will drink water, and that for all x_9, x_9 is a bartender we can infer that for all x_9, x_9 will drink water and x_9 is a bartender. From the fact that for all x_9, x_9 will drink water and x_9 is a bartender we can infer that for all x_9, x_9 will drink water. From the fact that for all x_9, if x_9 plays squash, then x_9 is not drinking water, and that for all x_9, x_9 will drink water we can infer that for all x_9, x_9 will not play squash. Finally, from the fact that there is at least one x_9 for which x_9 will take a plane if and only if x_9 will play squash, and that for all x_9, x_9 will not play squash we can infer that there is at least one x_9 for which x_9 will not take a plane, which contradicts that For all x_9, x_9 will take a plane. Therefore, the answer is no.