Think there is confusion here - if I understand correctly you are asking about the number generator, they are talking about the process of determining success.

Think there is confusion here - if I understand correctly you are asking about the number generator, they are talking about the process of determining success. Like in league of legends you have a listed crit chance but the way they determine success isnt to generate a number and compare it to your chance, you start with a smaller base number that gets incremented each time you fail and reset when you succeed - the end result is that your overall chance remains the same but the likelihood oh a streak (of fails or successes) goes down. Doesnt change the overall probability, drastically reduces variance.