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Accident (philosophy)

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Title: Accident (philosophy)  
Author: World Heritage Encyclopedia
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Subject: Substance theory, Modal logic, Aristotelian physics, Ousia, Transubstantiation
Collection: Christian Terminology, Metaphysics, Modal Logic, Philosophical Terminology
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Accident (philosophy)

Accident, as used in philosophy, is an attribute which may or may not belong to a subject, without affecting its essence.[1] The word "accident" has been employed throughout the history of philosophy with several distinct meanings.


  • Aristotelian substance theory 1
  • Modern philosophy 2
  • See also 3
  • References 4

Aristotelian substance theory

Aristotle made a distinction between the essential and accidental properties of a thing. For example, a chair can be made of wood or metal but this is accidental to its being a chair: that is, it is still a chair regardless of the material from which it is made.[2] To put this in technical terms, an accident is a property which has no necessary connection to the essence of the thing being described.[3][4][5]

To take another example, all bachelors are unmarried: this is a necessary or essential property of what it means to be a bachelor. A particular bachelor may have brown hair, but this would be a property particular to that individual, and with respect to his bachelorhood it would be an accidental property. And this distinction is independent of experimental verification: even if for some reason all the unmarried men with non-brown hair were killed, and every single existent bachelor had brown hair, the property of having brown hair would still be accidental, since it would still be logically possible for a bachelor to have hair of another color.

The nine kinds of accidents according to Aristotle are quantity, quality, relation, habitus, time, location, situation (or position), action, and passion ("being acted on"). Together with "substance", these nine kinds of accidents constitute the ten fundamental categories of Aristotle's ontology.[6]

Catholic theologians such as Thomas Aquinas have employed the Aristotelian concepts of substance and accident in articulating the theology of the Eucharist, particularly the transubstantiation of bread and wine into body and blood. According to this tradition, the accidents of the appearance of bread and wine do not change, but the substance changes from bread and wine to the Body and Blood of Christ.

Modern philosophy

In modern philosophy, an accident (or accidental property) is the union of two concepts: property and contingency. In relation to the first, an accidental property (Greek symbebekos)[7] is at its most basic level a property. The color "yellow", "high value", "Atomic Number 79" are all properties, and are therefore candidates for being accidental. On the other hand, "gold", "platinum", and "electrum" are not properties, and are therefore not classified as accidents.

There are two opposed philosophical positions that also impact the meaning of this term:

  • Anti-Essentialism (associated with Willard Van Orman Quine) argues that there are no essential properties at all, and therefore every property is an accident.
  • Modal Necessitarianism (associated with Saul Kripke), argues for the veracity of the modal system "Triv" (If P is true, then P must be true). The consequence of this theory is that all properties are essential (and no property is an accident).

See also


  1. ^ Guthrie, William Keith Chambers (1990). A History of Greek Philosophy. Cambridge University Press. p. 148.  
  2. ^ Thomas (2003). Commentary on Aristotle's Physics. Richard J. Blackwell, Richard J. Spath, W. Edmund Thirlkel. Continuum International Publishing Group. p. 29.  
  3. ^ "Aristotle - Metaphysics: Books Zeta and Eta". SparkNotes. Archived from the original on 18 December 2008. Retrieved 2008-12-19. 
  4. ^ "Aristotle on Non-contradiction". Stanford Encyclopedia of Philosophy. 2007-02-02. Retrieved 2008-12-19. 
  5. ^ Preus, Anthony; John P. Anton; George L. Kustas (1992). Essays in Ancient Greek Philosophy V. SUNY Press.  
  6. ^ "Predication and Ontology: The Categories". University of Washington. Retrieved 2008-12-19. 
  7. ^ Slomkowski, Paul (1997). Aristotle's Topics. BRILL. pp. 90–93.  
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