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Wikipedia at 20: How it survived controversy
It's been 20 years since the launch of the website, Wikipedia. Despite much criticism early on about inaccuracies, the online encyclopedia has become the 15th most popular destination on the web and is maintained by a community of volunteer editors. Today programme's Nick Robinson speaks to cognitive psychologist and author Professor Stephen Pinker and the founder of Wikipedia Jimmy Wales on the website's legacy and how it has escaped controversy. (Image: Wikipedia page; Credit: European Pressphoto Agency)