Consider the following premises. For all x_10, x_10 is an office clerk. For all x_10, if x_10 plays a game, then x_10 is working. There is at least one x_10 for which x_10 will play a game. Can we infer the following from them? There is at least one x_10 for which x_10 will work.
 From the fact that there is at least one x_10 for which x_10 will play a game, and that for all x_10, x_10 is an office clerk we can infer that there is at least one x_10 for which x_10 will play a game and x_10 is an office clerk. From the fact that there is at least one x_10 for which x_10 will play a game and x_10 is an office clerk we can infer that there is at least one x_10 for which x_10 will play a game. Finally, from the fact that for all x_10, if x_10 plays a game, then x_10 is working, and that there is at least one x_10 for which x_10 will play a game we can infer that there is at least one x_10 for which x_10 will work. Therefore, the answer is yes.