map length (tiers :: [[ Nat->Nat->Nat ]])  =  [0]

length (list :: [ Nat->Nat->Nat ])  =  0

allUnique (list :: [ Nat->Nat->Nat ])  =  True

ratioRepetitions (list :: [ Nat->Nat->Nat ])  =  0 % 1

tiers :: [Nat->Nat->Nat]  =
  [[]]