In "How to Take Smart Notes", Ahrens states that before you add a slip to your slipbox, you should: "Make sure it can be found from the index; add an entry in the index if necessary or refer to it from a note that is connected to the index." (p. 104) Originally, I thought it was just important that no slip gets orphaned and is connected to some thread of notes, but this statement gives me the impression that every slip must be no more than 1 degree of separation away from the Index. But once ...
