Consider the following premises. For all x_6, x_6 is a server or x_6 is rich. For all x_6, x_6 will play tennis or x_6 is not rich. For all x_6, if x_6 were a server, then x_6 is playing tennis. For all x_6, x_6 is a writer. Can we infer the following from them? There is at least one x_6 for which either x_6 is a writer or x_6 will play tennis are not true.
 From the fact that for all x_6, x_6 will play tennis or x_6 is not rich we can infer that for all x_6, if x_6 were rich, then x_6 is playing tennis. From the fact that for all x_6, if x_6 were a server, then x_6 is playing tennis, that for all x_6, if x_6 were rich, then x_6 is playing tennis, and that for all x_6, x_6 is a server or x_6 is rich we can infer that for all x_6, x_6 will play tennis. Finally, from the fact that for all x_6, x_6 is a writer, and that for all x_6, x_6 will play tennis we can infer that for all x_6, x_6 is a writer and x_6 will play tennis, which contradicts that There is at least one x_6 for which either x_6 is a writer or x_6 will play tennis are not true. Therefore, the answer is no.