Adding new notes to old notes and being forced to compare them leads not only to a constant improvement of one’s own work, but often discloses weaknesses in the texts we read. We have to compensate for that by being extra critical as readers and careful with extracting information from texts, and we always have to check the original source of a claim.30
Contradicting ideas, difference of perceived cause and other paradoxes are not problems in a negative sense but signals that there is a mystery to solve.