- Correspondence to: B Hale Philosophy Department, Campus Box 232, University of Colorado, Boulder, CO 80309-0232, USA;
- Received December 13, 2005
- Accepted February 28, 2006
- Revised February 25, 2006
- First published January 5, 2007.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.