Photography and the limits of the document - part 4 can be found here: http://www.tate.org.uk/context-comment/video/photography-and-limits-document Usually when photographers or associated thinkers are invited to give a talk they give a lecture. It's the way it's done, it's even expected - although hardly demanded. Having the key texts to build on and the vocabularly necessary to serve up meaningful ideas it's a surprise then when on close examination that much of what is dished up rarely holds up to scrutiny on a sentence-to-sentence level. It's nearly always half-baked thinking. Unfortunately in the arts being part of an established discourse is seen as proof of belonging. It's all very cautious, and almost certainly indicates a lack of confidence. In a generation photography has gone from being an area of minimal interest to intellectuals to now being dominated by theory. The 2003 Tate Lewis Baltz / David Harvey lecture (link above) did w