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On What MattersVolume Two$
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Derek Parfit

Print publication date: 2011

Print ISBN-13: 9780199572816

Published to Oxford Scholarship Online: May 2015

DOI: 10.1093/acprof:osobl/9780199572816.001.0001

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The Triple Theory

The Triple Theory

(p.244) 23 The Triple Theory
On What Matters

Samuel Scheffler

Oxford University Press

This chapter considers Triple Theory, which says everyone ought to follow Rule Consequentialist principles that are UA-optimific because these are the only principles with universal acceptance which everyone could rationally choose, and that no one could reasonably reject. In considering this theory, the chapter addresses four issues: what these optimific principles require us to do; whether these are the only principles the universal acceptance of which everyone could rationally choose; whether these are the only principles that no one could reasonably reject; and whether these are the principles that everyone ought to follow. It also explores the relation between Thomas M. Scanlon's Contractualism and that of Immanuel Kant. It suggests that Kantian Contractualism implies Rule Consequentialism, to which Scanlon has no objection. Finally, it discusses the Convergence Argument and the possibility of combining Kantian Rule Consequentialism with Scanlonian Contractualism.

Keywords:   universal acceptance, Triple Theory, optimific principles, Thomas M. Scanlon, Contractualism, Immanuel Kant, Rule Consequentialism

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