Consider the following premises. For all x_7, if x_7 were sad, then x_7 is a server. For all x_7, x_7 is a police officer or x_7 will not drive a car. There is at least one x_7 for which if x_7 were a server, then x_7 is driving a car. Can we infer the following from them? For all x_7, the fact that x_7 were sad does not imply that x_7 is a police officer.
That contradicts the premises. Therefore the answer is no.