“Some people believe that it isn’t so much power that is exchanged in TPE, as it is authority. The intrinsic difference between power and authority can best be explained thusly: If we were talking about a car, then power would be what was under the hood. Exercising that power would mean taking the car out for a spin. Having the authority to do so might involve a driver’s license, possessing the keys, or having the title and registration.”