Dispositionalism and the Modal Operators

Authors
David Yates
Universidade de Lisboa
Abstract
Actualists of a certain stripe—dispositionalists—hold that metaphysical modality is grounded in the powers of actual things. Roughly: p is possible iff something has, or some things have, the power to bring it about that p. Extant critiques of dispositionalism focus on its material adequacy, and question whether there are enough powers to account for all the possibilities we intuitively want to countenance. For instance, it seems possible that none of the actual contingent particulars ever existed, but it is impossible to explain this by appealing to the powers of some actual thing or things to bring it about. I argue instead that dispositionalism, in the simple form championed by its proponents, is formally inadequate. Dispositionalists interpret the modal operators as simple existential claims about powers, but if we interpret the operators that way, the resulting system of modal logic is too weak to capture metaphysical modality. I argue that we can modify the standard dispositionalist interpretations of the operators to secure formal adequacy, but at the cost of accepting that not all modality is grounded in powers. This, I shall suggest, is not a bad thing—the resulting theory still has powers at its core and has certain attractive features, in addition to formal adequacy, that the standard theory lacks.
Keywords Dispositionalism  Powers  Modality  Modal operators  Dispositions  Modal logic
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DOI 10.1111/phpr.12132
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References found in this work BETA

Truthmaking and Difference-Making.David Lewis - 2001 - Noûs 35 (4):602–615.
The Mind in Nature.C. B. Martin - 2007 - Oxford University Press.
I *-Armchair Philosophy, Metaphysical Modality and Counterfactual Thinking.Timothy Williamson - 2005 - Proceedings of the Aristotelian Society 105 (1):1-23.
Truthmakers and Modality.Ross Paul Cameron - 2008 - Synthese 164 (2):261 - 280.

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Citations of this work BETA

Counterpossibles for Dispositionalists.Barbara Vetter - 2016 - Philosophical Studies 173 (10):2681-2700.
On How (Not) to Define Modality in Terms of Essence.Robert Michels - forthcoming - Philosophical Studies:1-19.
Modal Semantics Without Worlds.Craig Warmke - 2016 - Philosophy Compass 11 (11):702-715.
A Plenitude of Powers.Barbara Vetter - forthcoming - Synthese:1-21.
The Nature of Necessity.Brian Leftow - 2017 - Res Philosophica 94 (3):359-383.

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