Think about things like speed limit.
How do you know how fast you are going? What is the accuracy of your speedometer?
You could be rightfully, to the best of your ability, be following the law... but your are just waiting to be busted.
Further on road stuff.
In Comifornia there are two laws.
- You must drive under the posted speed limit
- You must keep up with traffic.
So, if the traffic on the freeway is going 70, what speed should you be going if the posted speed is 55?
BTW, you can't use the second law to defend yourself in court.
But can you use the first law, if you break the second (You must keep up with traffic)?