In May 2012, I organized the symposium ‘Lighting the Cave’ at Central Saint Martins in London. The symposium set out ‘to interrogate themes of light, reflection and “truth” in and across the expanded field of artists’ film and video’. Sean Cubitt’s article, which follows this article, is a revised version of the keynote presentation he gave that day, entitled, ‘The shadow’, and sets the tone for much of what follows. ‘Lighting the cave’ was in many ways an extension of the exhibition, ‘Platon’s Mirror’ by the German artist, Mischa Kuball, a subtle and contemporary re-staging of Plato’s allegory of the cave in the context of modern media culture (CSM, 3–25 May 2012). Kuball’s mixed-media installation was also shown in the Lethaby Gallery at ...