Consider the following premises. For all x_1, x_1 is not a server. For all x_1, if x_1 were a scientist, then x_1 is a server. For all x_1, x_1 is a scientist if and only if x_1 will drive a car. Can we infer the following from them? If we can, name the inference rule being used: For all x_1, x_1 will not drive a car.
 From the fact that for all x_1, if x_1 were a scientist, then 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 scientist via universal modus tollens. Finally, from the fact that for all x_1, x_1 is a scientist if and only if x_1 will drive a car, and that for all x_1, x_1 is not a scientist we can infer that for all x_1, x_1 will not drive a car via universal biconditional elimination. Therefore, the answer is yes.