Consider the following premises. For all x_1, x_1 is a police officer if and only if x_1 will drive a car. For all x_1, if x_1 drives a car, then x_1 is a carpenter. For all x_1, x_1 is a carpenter if and only if x_1 is a police officer. Can we infer the following from them? If we can, name the inference rule being used: For all x_1, x_1 is a carpenter if and only if x_1 is a police officer.
That is one of the premises. Therefore, the answer is yes.