If you make an error in the project (or during the manufacture) of a structure or complex technical product, then as a result this thing (plane, car, rocket, bridge, building, etc.) may not go, not fly, fall, break, show not the characteristics that expected from it. In medicine, errors also sometimes lead to serious consequences: the wrong tablet was given, they cut it off or sewed ... But what will happen if mistakes are made in the humanitarian sphere?