The Zettelkasten Method seems to get more and more popular. With popularity of methods there always comes a problem: Overzealous Orthodoxy. Some people, for various reasons, try to state what a Zettelkasten is and what not. A good example is the use of categories: Do you have a Zettelkasten if you use a Zettelkasten? Some people argue that you wouldn’t have a Zettelkasten if you use a Zettelkasten and the very point of a Zettelkasten is to ditch the categories.