Consider the following premises. There is at least one x_5 for which if x_5 were a bartender, then x_5 is playing squash. For all x_5, if x_5 takes a plane, then x_5 is sleeping. For all x_5, x_5 will not sleep. For all x_5, if x_5 plays squash, then x_5 is taking a plane. Can we infer the following from them? For all x_5, x_5 is a bartender.
 From the fact that for all x_5, if x_5 takes a plane, then x_5 is sleeping, and that for all x_5, x_5 will not sleep we can infer that for all x_5, x_5 will not take a plane. From the fact that for all x_5, if x_5 plays squash, then x_5 is taking a plane, and that for all x_5, x_5 will not take a plane we can infer that for all x_5, x_5 will not play squash. Finally, from the fact that there is at least one x_5 for which if x_5 were a bartender, then x_5 is playing squash, and that for all x_5, x_5 will not play squash we can infer that there is at least one x_5 for which x_5 is not a bartender, which contradicts that For all x_5, x_5 is a bartender. Therefore, the answer is no.