How to expand on ideas? (opens in new tab)

Usually when I take notes on books either I note down a concept or a claim. When it's a concept I don't experience an issue. The problem is I cannot find something to write about claims since they look self-sustained. Asking questions seem like a good solution. But the answers belong to another note. Still nothing to write in my atomic notes. I only group ideas and write meta notes which create a structure between ideas. Can you offer insights on the ways you use?