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The Four-Category OntologyA Metaphysical Foundation for Natural Science$
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E. J. Lowe

Print publication date: 2005

Print ISBN-13: 9780199254392

Published to Oxford Scholarship Online: May 2006

DOI: 10.1093/0199254397.001.0001

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Ontological Categories and Categorial Schemes

Ontological Categories and Categorial Schemes

(p.3) 1 Ontological Categories and Categorial Schemes
The Four-Category Ontology

E. J. Lowe (Contributor Webpage)

Oxford University Press

A realist approach to metaphysics and ontology is defended in the face of some antirealist tendencies in contemporary philosophical thought. The general notion of an ontological category is explained and justified. Different systems of ontological categories are compared and contrasted with the four-category ontology: a one-category ontology of modes or tropes, a two-category ontology of particulars and universals, and a two-category ontology of substantial particulars and modes. The ontological status of states of affairs and natural laws, and the ontological implications of the truthmaker principle as advocated by D. M. Armstrong are discussed.

Keywords:   D. M. Armstrong, metaphysical realism, natural laws, ontological categories, states of affairs, tropes, truthmakers, universals

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