Consider the following premises. For all x_7, x_7 is a server or x_7 is not a writer. For all x_7, x_7 is a writer. There is at least one x_7 for which if x_7 were a server, then x_7 is sad. Can we infer the following from them? There is at least one x_7 for which x_7 is sad.
 From the fact that for all x_7, x_7 is a server or x_7 is not a writer we can infer that for all x_7, if x_7 were a writer, then x_7 is a server. From the fact that for all x_7, if x_7 were a writer, then x_7 is a server, and that there is at least one x_7 for which if x_7 were a server, then x_7 is sad we can infer that there is at least one x_7 for which if x_7 were a writer, then x_7 is sad. Finally, from the fact that there is at least one x_7 for which if x_7 were a writer, then x_7 is sad, and that for all x_7, x_7 is a writer we can infer that there is at least one x_7 for which x_7 is sad. Therefore, the answer is yes.