In recent years, the work of self-taught artists has come to be contextualized within larger narratives of contemporary art. How is Outsider Art best understood and what does this definition mean when ‘inside’ and ‘outside’ become blurred? How does it relate to fraught issues of education and exclusion, originality and exploitation? Jonathan Griffin invited Robert Gober, Matthew Higgs, Paul Laffoley and David Maclagan to discuss these questions