Consider the following premises. There is at least one x_7 for which if x_7 plays a game, then x_7 is playing tennis. For all x_7, x_7 is not an office clerk. For all x_7, x_7 is an office clerk or x_7 is an artist. For all x_7, if x_7 were an artist, then x_7 is playing a game. Can we infer the following from them? For all x_7, x_7 will not play tennis.
 From the fact that for all x_7, x_7 is an office clerk or x_7 is an artist, and that for all x_7, x_7 is not an office clerk we can infer that for all x_7, x_7 is an artist. From the fact that for all x_7, if x_7 were an artist, then x_7 is playing a game, and that there is at least one x_7 for which if x_7 plays a game, then x_7 is playing tennis we can infer that there is at least one x_7 for which if x_7 were an artist, then x_7 is playing tennis. Finally, from the fact that there is at least one x_7 for which if x_7 were an artist, then x_7 is playing tennis, and that for all x_7, x_7 is an artist we can infer that there is at least one x_7 for which x_7 will play tennis, which contradicts that For all x_7, x_7 will not play tennis. Therefore, the answer is no.