As far as the technology is concerned, there is no secret. It has all been in the open for more than three decades now. So why is not everybody using a slip-box and working effortlessly towards success? Is it because it is too complicated?

Sönke Ahrens, How to take smart notes: One simple technique to boost writing, learning and thinking – for students, academics and nonfiction book writers, Scotts Valley, CA, 2017, p. 25