“I had […] during many years followed a golden rule, namely, that whenever a published fact, a new observation or thought came across me, which was opposed to my general results, to make a memorandum of it without fail and at once; for Ihad found by experience that such facts and thoughts were far more apt to escape from the memory than favorable ones. Owing to this habit, very few objections were raised against my views, which I had not at least noticed and attempted to answer.”

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. 88