The principle of this rule is that if it exists, doesn’t exist, or can be conceived by human mind, there will always be someone else offend by whatever it is.
Person 1: “I love eating pizza dude it’s my favorite food.”
Offended Person: “wow, I just can’t believe you, your not even Italian you can’t compliment pizza if your not Italian you racist scum”
Person 1: “it’s a fucking slice of pizza my guy, you’re a prime example of rule 20”
IT MEANS NO FIRE AND IT IS A BITCH-
Toaster: "Let us burn people."
Fade: "No rule 20 is in affect."
Toaster: "B get rid of rule 20."
B: "No."
The 20 day time period when a girl likes a boy. After 20 days the girl loses feelings and moves on. This occurs until she finds a man
Jules has a 20 day rule when she snaps boys after 20 she is on to another boy and loses feeling for the first one.