Consider the following premises. For all x_18, x_18 is a police officer if and only if x_18 will play a game. For all x_18, x_18 is not a server or x_18 is a scientist. There is at least one x_18 for which if x_18 plays tennis, then x_18 is a server. For all x_18, if x_18 writes a letter, then x_18 is a server. For all x_18, if x_18 were a scientist, then x_18 is playing a game. For all x_18, x_18 will write a letter or x_18 will play tennis. Can we infer the following from them? For all x_18, x_18 will not play a game.
 From the fact that for all x_18, x_18 is a police officer if and only if x_18 will play a game we can infer that for all x_18, if x_18 were a police officer, then x_18 is playing a game. From the fact that for all x_18, if x_18 writes a letter, then x_18 is a server, that there is at least one x_18 for which if x_18 plays tennis, then x_18 is a server, and that for all x_18, x_18 will write a letter or x_18 will play tennis we can infer that there is at least one x_18 for which x_18 is a server. From the fact that there is at least one x_18 for which x_18 is a server we can infer that there is at least one x_18 for which x_18 is a server or x_18 is a police officer. From the fact that there is at least one x_18 for which x_18 is a server or x_18 is a police officer, and that for all x_18, x_18 is not a server or x_18 is a scientist we can infer that there is at least one x_18 for which x_18 is a police officer or x_18 is a scientist. Finally, from the fact that for all x_18, if x_18 were a police officer, then x_18 is playing a game, that for all x_18, if x_18 were a scientist, then x_18 is playing a game, and that there is at least one x_18 for which x_18 is a police officer or x_18 is a scientist we can infer that there is at least one x_18 for which x_18 will play a game, which contradicts that For all x_18, x_18 will not play a game. Therefore, the answer is no.