I wrote this paper between 1999 and 2001, and placed a draft on my website. It will never be published, though some portions of it made their way into my Theories of Location, but has been widely cited so I maintain the final draft here for reference.
Abstract: This paper discusses the possibility of entension, the phenomenon of a material object being wholly located in multiple places. It argues that even a very extreme form of entension is conceptually possible (the “monist” hypothesis that the entire universe entends), but that we know that this not actually the case. However, quantum mechanical “non-locality” effects may be interpreted as providing evidence that some things entend.
Updated December 2013: Got the bibliography back in place; unfortunately now the diagrams won’t compile (they were drawn with an ancient version of GNU dia which I now can’t get to work). You will have to use your imagination.
Until September 2016 I am a Tutorial Fellow in Philosophy at Corpus Christi College and an Associate Professor in the Oxford Philosophy Faculty. From then on, I'll be a Senior Adviser at the New Zealand Ministry of Transport.
My intellectual interests are mainly in metaphysics, philosophy of language, and ethics, and of course transport policy.
Read draft