Have your cake and eat it too: The old principal principle reconciled with the new

Abstract
David Lewis (1980) proposed the Principal Principle (PP) and a “reformulation” which later on he called ‘OP’ (Old Principle). Reacting to his belief that these principles run into trouble, Lewis (1994) concluded that they should be replaced with the New Principle (NP). This conclusion left Lewis uneasy, because he thought that an inverse form of NP is “quite messy”, whereas an inverse form of OP, namely the simple and intuitive PP, is “the key to our concept of chance”. I argue that, even if OP should be discarded, PP need not be. Moreover, far from being messy, an inverse form of NP is a simple and intuitive Conditional Principle (CP). Finally, both PP and CP are special cases of a General Principle (GP); it follows that so are PP and NP, which are thus compatible rather than competing.
Keywords Analytic Philosophy  Contemporary Philosophy  Philosophy of Mind
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ISBN(s) 0031-8205
DOI 10.1111/j.1933-1592.2004.tb00399.x
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References found in this work BETA
Naming and Necessity.Saul A. Kripke - 1980 - Harvard University Press.
Naming and Necessity.Saul Kripke - 2010 - In Darragh Byrne & Max Kölbel (eds.), Philosophy. Routledge. pp. 431-433.
Humean Supervenience Debugged.David Lewis - 1994 - Mind 103 (412):473--490.
What Conditional Probability Could Not Be.Alan Hájek - 2003 - Synthese 137 (3):273--323.

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Citations of this work BETA
Two Mistakes Regarding the Principal Principle.Christopher J. G. Meacham - 2010 - British Journal for the Philosophy of Science 61 (2):407-431.
The Anatomy of the Big Bad Bug.Rachael Briggs - 2009 - Noûs 43 (3):428-449.

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