Mr  Chen: yesterday when I was driving, the police issued a ticket on the grounds that I was speeding  It is unfair for the police to do so  I'm sure I saw a lot of cars speeding at that time  Why was I the only one punished  Ms  Jia: you were not treated unfairly because the police couldn't stop all speeding cars at that time
If everyone who violates traffic rules is equally likely to be punished, the punishment for any one of them is fair.
 In fact, everyone who was speeding at that time could also be issued a ticket