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Appears in Collections:Law and Philosophy Journal Articles
Peer Review Status: Refereed
Title: Peacocke’s Principle-Based Account of Modality: “Flexibility of Origins” Plus S4
Authors: Roca-Royes, Sonia
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Keywords: Necessity of Origin
Flexibility of Origin
Possible Worlds
Issue Date: Nov-2006
Publisher: Springer
Citation: Roca-Royes S (2006) Peacocke’s Principle-Based Account of Modality: “Flexibility of Origins” Plus S4, Erkenntnis, 65 (3), pp. 405-426.
Abstract: Due to the influence of Nathan Salmon’s views, endorsement of the “flexibility of origins” thesis is often thought to carry a commitment to the denial of S4. This paper rejects the existence of this commitment and examines how Peacocke’s theory of the modal may accommodate flexibility of origins without denying S4. One of the essential features of Peacocke’s account is the identification of the Principles of Possibility, which include the Modal Extension Principle (MEP), and a set of Constitutive Principles. Regarding their modal status, Peacocke argues for the necessity of MEP, but leaves open the possibility that some of the Constitutive Principles be only contingently true. Here, I show that the contingency of the Constitutive Principles is inconsistent with the recursivity of MEP, and this makes the account validate S4. It is also shown that, compatibly with the necessity of the Constitutive Principles, the account can still accommodate intuitions about flexibility of origins. However, the account we end up with once those intuitions are consistently accommodated may not be satisfactory, and this opens up the debate about whether or not artefacts allow for some variation in their origins.
Type: Journal Article
DOI Link:
Rights: Published in Erkenntnis by Springer. The original publication is available at
Affiliation: Philosophy

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