Plantinga’s Haecceitism and Simple Quantified Modal Logic

Luigi Pavone



In a series of papers Alvin Plantinga argued for a serious actualist modal semantics based on the notions of possible world, understood as maximal possible state of affairs, and of individual essence (haecceity). Plantinga’s actualism is known as haecceitism. In spite of the fact that haecceitism has been thought by Plantinga to require a Kripke-style semantics, the aim of this paper is to show that it is compatible with constant domains semantics and the simplest quantified modal logic. I will argue that not only does this approach have all the advantages of a greater simplicity in combining quantification and modalities, but also it better conforms to the actualist program.


haecceitism; Kripke models; simplest quantified modal logic

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Adams, R.M., “Primitive thisness and primitive identity”, The Journal of Philosophy 76 (1979): 5–26. DOI: 10.2307/2025812

Bennett, K., “Proxy ‘actualism’”, Philosophical Studies 129 (2006): 263–294. DOI: 10.1007/s11098-004-1641-2

Hodes, H., “Axioms for actuality”, Journal of Philosophical Logic 13, 1 (1984): 27–34. DOI: 10.1007/BF00297575

Jager, T., “An actualist semantics for quantified modal logic”, Notre Dame Journal of Formal Logic 23 (1982): 335–349.

Kripke, S., “Semantical considerations on modal logic”, Acta Philosophica Fennica 16 (1963): 83–94. Reprinted in J.-Y. Beziau (ed.), Universal Logic: An Anthology, pages 197–208, 2012. DOI: 10.1007/978-3-0346-0145-0_16

Menzel, C., “Actualism, ontological commitment, and possible worlds semantics”, Synthese 85, 3 (1990): 355–389. DOI: 10.1007/BF00484834

Nelson, M., E. Zalta, “Bennett and ‘proxy actualism’”, Philosophical Studies 142 (2009): 277–292. DOI: 10.1007/s11098-007-9186-9

Plantinga, A., “Actualism and possible worlds”, Theoria 42 (1976): 139–160. DOI: 10.1111/j.1755-2567.1976.tb00681.x

Plantinga, A., “On existentialism”, Philosophical Studies 44, 1 (1983): 1–20. DOI: 10.1007/BF00353411

Plantinga, A., “De essentia”, pages 139–157 in A. Plantinga and M. Davidson (eds.), Essays in the Metaphysics of Modality, Oxford University Press, Oxford, New York, 2003. DOI: 10.1093/0195103769.003.0008

Pollock, J.L., “Plantinga on possible worlds”, pages 121–144 in J.E. Tomberlin and P. van Inwagen (eds.), Alvin Plantinga, Profiles, Volume 5, D. Reidel Publishing Company, Dordrecht, Boston, Lancaster, 1985. DOI: 10.1007/978-94-009-5223-2_3

Linsky, B., and E. Zalta, “In defence of the simplest quantified modal logic”, Philosophical Perspectives 8, Logic and Language (1994): 431–458. DOI: 10.2307/2214181

Linsky, B., E. Zalta, “In defence of the contingently nonconcrete”, Philosophical Studies 84 (1996): 283–294. DOI: 10.1007/BF00354491

Quine, W.V.O., “On what there is”, in W.V.O. Quine From a Logical Point of View, Harvard U.P., Cambridge, Mass., 1953.

Williamson, T., “Existence and contingency”, Aristotelian Society Supplementary Volume 73, 1 (1999): 181–203. DOI: 10.1111/1467-8349.00054

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