If something is unordered it does not mean it may not be ordered. It only says you cannot assume that it is ordered. (A Collection in Java/C# is an unordered c

If something is unordered it does not mean it may not be ordered. It only says you cannot assume that it is ordered. (A Collection in Java/C# is an unordered contract, but a List is also a Collection.) But the idea of a list also suggests an ordering to me.