Consider the following premises. There is at least one x_9 for which x_9 is not a taxi driver. For all x_9, if x_9 plays a game, then x_9 is playing tennis. For all x_9, if x_9 plays tennis, then x_9 is playing a game. For all x_9, if x_9 plays a game, then x_9 is a taxi driver. Can we infer the following from them? For all x_9, x_9 will play tennis.
 From the fact that for all x_9, if x_9 plays a game, then x_9 is playing tennis, and that for all x_9, if x_9 plays tennis, then x_9 is playing a game we can infer that for all x_9, x_9 will play a game if and only if x_9 will play tennis. From the fact that for all x_9, if x_9 plays a game, then x_9 is a taxi driver, and that there is at least one x_9 for which x_9 is not a taxi driver we can infer that there is at least one x_9 for which x_9 will not play a game. Finally, from the fact that for all x_9, x_9 will play a game if and only if x_9 will play tennis, and that there is at least one x_9 for which x_9 will not play a game we can infer that there is at least one x_9 for which x_9 will not play tennis, which contradicts that For all x_9, x_9 will play tennis. Therefore, the answer is no.