Consider the following premises. For all x_5, x_5 is not a musician. For all x_5, if x_5 were a cashier, then x_5 is a musician. For all x_5, if x_5 plays tennis, then x_5 is a cashier. There is at least one x_5 for which if x_5 were a cashier, then x_5 is playing tennis. Can we infer the following from them? There is at least one x_5 for which x_5 will not play tennis.
 From the fact that there is at least one x_5 for which if x_5 were a cashier, then x_5 is playing tennis, and that for all x_5, if x_5 plays tennis, then x_5 is a cashier we can infer that there is at least one x_5 for which x_5 is a cashier if and only if x_5 will play tennis. From the fact that for all x_5, if x_5 were a cashier, then x_5 is a musician, and that for all x_5, x_5 is not a musician we can infer that for all x_5, x_5 is not a cashier. Finally, from the fact that there is at least one x_5 for which x_5 is a cashier if and only if x_5 will play tennis, and that for all x_5, x_5 is not a cashier we can infer that there is at least one x_5 for which x_5 will not play tennis. Therefore, the answer is yes.