Consider the following premises. For all x_8, if x_8 were a server, then x_8 is taking a plane. There is at least one x_8 for which if x_8 plays tennis, then x_8 is drinking water. For all x_8, x_8 will play tennis if and only if x_8 will take a plane. Can we infer the following from them? There is at least one x_8 for which if x_8 were a server, then x_8 is drinking water.
 From the fact that for all x_8, x_8 will play tennis if and only if x_8 will take a plane we can infer that for all x_8, if x_8 takes a plane, then x_8 is playing tennis. From the fact that for all x_8, if x_8 were a server, then x_8 is taking a plane, and that for all x_8, if x_8 takes a plane, then x_8 is playing tennis we can infer that for all x_8, if x_8 were a server, then x_8 is playing tennis. Finally, from the fact that for all x_8, if x_8 were a server, then x_8 is playing tennis, and that there is at least one x_8 for which if x_8 plays tennis, then x_8 is drinking water we can infer that there is at least one x_8 for which if x_8 were a server, then x_8 is drinking water. Therefore, the answer is yes.