>You really don't know what it is? What if I don't? Some of us program more abstract things than the others. For example I might want to write a function, that

>You really don't know what it is? What if I don't? Some of us program more abstract things than the others. For example I might want to write a function, that given a tree, and, well, a value, returns a tree where all nodes that have this value are removed. Doesn't matter that the tree in question will in practice be a tree of Flooblooators, I'd rather write reusable code that works for everything.