Enthusiasm about data visualization has exploded in the past decade, with professionals from varied disciplines adopting it as a tool for discovery and communication. This is great news, as visualization is indeed a language that is as powerful as it is flexible. However, many views about how we should design and interpret visualizations are still naive. Many journalists, designers and analysts think, for instance, that a data map or graph alone can “prove” a statement or opinion, or that visualizations are always intuitive, univocal and unambiguous. This talk debunks those myths and many others surrounding visualization.