When talking about the Tlatelolco 1968 massacre, neither official sources nor the voice of the people aim to tell the factual truth of what occurred. Instead, they stir up feelings of anger, sadness, or shame. This book shows that the extent to which these emotions are triggered affects how much those reading the story or article will believe it. This is why so many different ‘truths’ have grown up around the event over the past fifty years. If those emotions are not triggered, the reader will not believe the text, even if the information it contains is the same as in the ‘truthful’ piece.