If you ask academic or nonfiction writers, students or professors how much time they expect it would take them to finish a text, they systematically underestimate the time they need – even when they are asked to estimate the time under the worst-case scenario and if the real conditions turned out to be quite favourable (Kahneman 2013, 245ff). On top of that: half of all doctoral theses will stay unfinished forever (Lonka, 2003, 113).