diagrams

david has sent us a diagram of how to manufacture authenticity. i'm really interested in how diagrams might be an expression of concepts, and how they secretly might be taking over the world and structuring the way we look, deciding what we can and cannot see.
Last night in philosophy class (before the dreadful ignominy of being thrown off the bus at Elephant and Castle), we were talking about Plato and Descartes and how the concept - a transcendental object without fuzzy edges - dominates our thinking still. how can you recognise a chair without having an idea of 'chairness', je disais a Marianne? how do we find a home for our lost objects - do we invent new concepts? is it enough if our new concepts are kooky and blurry round the edges? i remember an artwork - can't remember the artist now - who made a whole category of objects called 'Things that Fall Down'. I like the idea of Things that Lean, Things that Pretend to be Something they're Not, Things that get Stranger the Longer you Look at Them.