“For the first time in this section “Weekend Reasoning” curated by me, the title of the article is not placed in terms of question. Usually, in fact, I try to put on the plate a topic on which readers can reason, giving between the lines my personal opinion but leaving room for every possible interpretation and evaluation. This time I start from a statement, thus revealing in advance the result of my reasoning. Maybe I’m wrong, and we would miss it. But at least the intent is made clear from the beginning. The constraint has a value. But what kind of constraint are we talking about? Let’s go deeper.”