Rank each mathematical variable “x” tier: reserved for “x”, the goat “Great” tier: reserved for the next best variables “Would use” tier: reserved for variables you would use, but aren’t great “Isn’t bad, but would never use” tier: reserved for okay variables that you wouldn’t use “Never ever use this shit” tier: reserved for the worst variables besides “t” “t” tier: reserved for the absolute worst variable, “t”