While I am writing these notes, it becomes obvious that the answer to the question “why” has already triggered more follow-up questions, like: Isn’t this already discussed in theories of social inequality? If yes: Who discussed it? If not: Why not? And where do I turn to, to find answers to these questions? Correct: The first choice for further inquiry is the slip-box. Maybe there is already something on social inequality that helps me to answer these questions, or at least an indication of where to look.
Your notes should answer the questions you care to ask. What are you going to create with it? What questions are you going to want to answer? Over time you may have answers to new questions already.