If the foot-and-mouth disease Jiu-Jitsu purple belt is true, this is what happens

(1)- Starting with the purple belt, it’s an advanced level
(2)You can say that you have acquired a lot of advanced skills as well as professional knowledge of numbers Purple belts are people who have learned Jiu-Jitsu for a long time, so the number of people wearing belts from then on decreases significantly