The art of propaganda is not only сreating an alternative picture of reality, but also making you doubt that an objective truth essentially exists. Everyone has his own truth, meaning that there is no need in straining your brain to see into facts. It’s enough to take the most convenient opinion for granted. American director Robert Kenner, the maker of ‘Merchants of Doubt’ based on the acclaimed eponymous book by historians of science Naomi Oreskes and Erik Conway, shows how with the help of the same technology to make the public doubt scientific facts: harm of smoking, danger of acid rains, ozone holes and man-made global warming.