Numbers have invaded our life. They today are utilized to track the evolution of the pandemic. According to poll opinions, they give rhythm to political life to a point where ideas debate has largely let its place to comments about respective positions of one or another political leader in the opinion. They are at the origin of the whole economic thought, even when the concepts they measure have become obsolete and unsuitable to describe the world as it is or as it is changing. They sometimes guarantee our survival, as in a plane where the assessment of all the flying ...