Here is a copy of my 2005 paper Systems of Measurement . I remain quite pleased with this one, and especially with the smedlium case analogy. It's a bit long, though. Any comments gratefully received. By the way, if anyone wants a better-formatted version, get in touch (some formatting is lost in this version, which can make it tricky to follow in places)
Stephen Law is a philosopher and author. Currently Director of Philosophy and Cert HE at Oxford University Department of Continuing Education. Stephen has also published many popular books including The Philosophy Gym, The Complete Philosophy Files, and Believing Bullshit. For school talks/ media: stephenlaw4schools.blogspot.co.uk Email: think-AT-royalinstitutephilosophy.org