Of course documentation, even when present, even in the code, is often of the "This does X" sort. When you want "You need this to accomplish {larger task}". It

Of course documentation, even when present, even in the code, is often of the "This does X" sort. When you want "You need this to accomplish {larger task}". It's like walking through the forest and wondering where you are, but every tree has a sign on it that says "tree".