Consider the following premises. For all x_7, if x_7 were a musician, then x_7 is a cashier. For all x_7, x_7 will not play a game. For all x_7, x_7 will play a game if and only if x_7 is a cashier. For all x_7, x_7 is a soldier if and only if x_7 is a musician. Can we infer the following from them? There is at least one x_7 for which x_7 is a soldier.
 From the fact that for all x_7, x_7 will play a game if and only if x_7 is a cashier, and that for all x_7, x_7 will not play a game we can infer that for all x_7, x_7 is not a cashier. From the fact that for all x_7, if x_7 were a musician, then x_7 is a cashier, and that for all x_7, x_7 is not a cashier we can infer that for all x_7, x_7 is not a musician. Finally, from the fact that for all x_7, x_7 is a soldier if and only if x_7 is a musician, and that for all x_7, x_7 is not a musician we can infer that for all x_7, x_7 is not a soldier, which contradicts that There is at least one x_7 for which x_7 is a soldier. Therefore, the answer is no.