Consider the following premises. For all x_1, if x_1 were a server, then x_1 is a scientist. For all x_1, x_1 is a politician if and only if x_1 is a server. For all x_1, x_1 is not a scientist. Can we infer the following from them? For all x_1, x_1 is not a politician.
 From the fact that for all x_1, if x_1 were a server, then x_1 is a scientist, and that for all x_1, x_1 is not a scientist we can infer that for all x_1, x_1 is not a server. Finally, from the fact that for all x_1, x_1 is a politician if and only if x_1 is a server, and that for all x_1, x_1 is not a server we can infer that for all x_1, x_1 is not a politician. Therefore, the answer is yes.