Credit Kayana Szymczak  2020 will mark the tenth anniversary of the publication of Merchants of Doubt, a book that in Europe and the USA has had an impact due to its capacity to make us ponder the effects of truth and the use of doubt as a semiotic and narrative practice that deconstructs scientific research for political and economic purposes. More pertinent than ever in this era of hoaxes, fake news, trolls and psychographics. The book is indeed a guide to understanding how the doubt machine works to influence the market, businesses or political persuasions. In a world where communication becomes a mirror maze, the echo chamber distorts and amplifies those who shout the loudest, where journalism must deal with the post-truth of social media, influencers and co...