Consider the following premises. For all x_8, x_8 is not a cashier. There is at least one x_8 for which x_8 is an astronaut or x_8 will read a book. For all x_8, x_8 will read a book if and only if x_8 will take a plane. For all x_8, x_8 is not an astronaut or x_8 will drink water. For all x_8, if x_8 takes a plane, then x_8 is a cashier. Can we infer the following from them? There is at least one x_8 for which x_8 will drink water.
 From the fact that for all x_8, if x_8 takes a plane, then x_8 is a cashier, and that for all x_8, x_8 is not a cashier we can infer that for all x_8, x_8 will not take a plane. From the fact that there is at least one x_8 for which x_8 is an astronaut or x_8 will read a book, and that for all x_8, x_8 is not an astronaut or x_8 will drink water we can infer that there is at least one x_8 for which x_8 will read a book or x_8 will drink water. From the fact that for all x_8, x_8 will read a book if and only if x_8 will take a plane, and that for all x_8, x_8 will not take a plane we can infer that for all x_8, x_8 will not read a book. Finally, from the fact that there is at least one x_8 for which x_8 will read a book or x_8 will drink water, and that for all x_8, x_8 will not read a book we can infer that there is at least one x_8 for which x_8 will drink water. Therefore, the answer is yes.