In the Appendix of his book (2022, p. 149), Sönke Ahrens gives an example of a series of Luhmann’s notes. On a note numbered 9/8,3, Luhmann would have written: “Spirit in the box?” (p. 150) And on note 9/8, he would have noticed: “Zettelkasten as a cybernetic system.” (p. 151) Given that, my question could be: “What should be a slip-box if it must be able to resolve the “productivity problem” Luhmann was thinking about in his 9/8a (p. 152) when he writes about communication between a user with his or her notes?” Or, “What should be a digital slip-box to embrace such a complexity, I mean: what should be the interface between a user and notes in order to see the spirit in a box?” That’s exactly what the Tinderbox Attribute Browser helps me to resolve.