In this blog Greg draws out the secrets that many ‘professional experts’ and ‘armchair analysts’ seek to hide. The world is just too messy to be perfectly represented by a theoretical model, indeed, all models are wrong, but some are just useful. This has recently been highlighted by other discussions that lie at the heart of the use of improvement science and other social sciences, the tendency to obscure the limitations of a method by utilising mathsiness and collecto-babble (http://bit.ly/1fk7kD5)… An interesting and engaging piece, well worth your time.