John: As I was driving to work this morning, I was stopped by a police officer and ticketed for speeding  Since there were many other cars around me that were going as fast as I was, the police officer clearly treated me unfairly  Mary: You were not treated unfairly, since the police officer was obviously unable to stop all the drivers who were speeding
Everyone who was speeding at that time and place had an equal chance of being stopped
It is fairer not to enforce a traffic law at all than it is to enforce it in some, but not all, of the cases to which it applies.