Of course you cannot say or do anything of value without generalization. However: there's a big difference between stopping a certain type of car after a robbe

Of course you cannot say or do anything of value without generalization. However: there's a big difference between stopping a certain type of car after a robbery and stopping certain kinds of cars every day, without any specific reason, until you can charge a black youth with cannabis possession. A white person hasn't ever been stopped in a "routine" traffic stop and a black youth has been stopped 4 times in the last month and then searched because a cop claimed he "smelled marijuana" -- that is a bias problem.