The Possibility of Practical Reason Author(s): J. David Velleman Reviewed work(s): Source: Ethics, Vol. 106, No. 4 (Jul., 1996), pp. 694-726 Published by: The University of Chicago Press Stable URL: http://www.jstor.org/stable/2382031 . Accessed: 03/01/2012 10:44 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact
[email protected]. The University of Chicago Press is collaborating with JSTOR to digitize, preserve and extend access to Ethics. http://www.jstor.org ARTICLES The Possibility of Practical Reason* J. David Velleman Suppose that reasons for someone to do something must be considera- tions that would sway him toward doing it if he entertained them rationally.' And suppose that the only considerations capable of sway- ing someone toward an action are those which represent it as a way of attaining something he wants, or would want once apprised of its attainability.2 These assumptions, taken together, seem to imply that * I am grateful to Sonja Al-Sofi, Stephen Darwall, Jennifer Church, Paul Boghos- sian, Alfred Mele, Elijah Millgram, Derek Parfit, Peter Railton, Sigrun Svavarsdottir, Nicholas White, Bernard Williams, Stephen Yablo, and several anonymous referees for helpful discussions of the issues raised in this article.