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Haecceity (/hɛkˈsiːɪti, hiːk-/; from the Latin haecceitas, which translates as "thisness") is a term from medieval scholastic philosophy, first coined by followers of Duns Scotus to denote a concept that he seems to have originated: the irreducible determination of a thing that makes it this particular thing. Haecceity is a person's or object's thisness, the individualising difference between the concept "a man" and the concept "Socrates" (i.e., a specific person).[1] In modern philosophy of physics, it is sometimes referred to as primitive thisness.[2]
Haecceity is a Latin neologism formed as an abstract noun derived from the demonstrative pronoun "haec(ce)", meaning "this (very)" (feminine singular) or "these (very)" (feminine or neuter plural). It is apparently formed on the model of another (much older) neologism, viz. "qui(d)ditas" ("whatness"), which is a calqueofAristotle's Greek to ti esti (τὸ τί ἐστι)[3] or "the what (it) is."
Haecceity may be defined in some dictionaries as simply the "essence" of a thing, or as a simple synonym for quiddityorhypokeimenon. However, in proper philosophical usage these terms have not only distinct but opposite meanings. Whereas haecceity refers to aspects of a thing that make it a particular thing, quiddity refers to the universal qualities of a thing, its "whatness", or the aspects of a thing it may share with other things and by which it may form part of a genus of things.[4]
Duns Scotus makes the following distinction:
Because there is among beings something indivisible into subjective parts—that is, such that it is formally incompatible for it to be divided into several parts each of which is it—the question is not what it is by which such a division is formally incompatible with it (because it is formally incompatible by incompatibility), but rather what it is by which, as by a proximate and intrinsic foundation, this incompatibility is in it. Therefore, the sense of the questions on this topic [viz. of individuation] is: What is it in [e.g.] this stone, by which as by a proximate foundation it is absolutely incompatible with the stone for it to be divided into several parts each of which is this stone, the kind of division that is proper to a universal whole as divided into its subjective parts?
— Duns Scotus, Ordinatio II, d. 3, p. 1. q. 2, n. 48]
InScotism and the scholastic usage in general, therefore, "haecceity" properly means the irreducible individuating differentia which together with the specific essence (i.e. quiddity) constitutes the individual (or the individual essence), in analogy to the way specific differentia combined with the genus (or generic essence) constitutes the species (or specific essence). Haecceity differs, however, from the specific differentia, by not having any conceptually specifiable content: it does not add any further specification to the whatness of a thing but merely determines it to be a particular unrepeatable instance of the kind specified by the quiddity. This is connected with Aristotle's notion that an individual cannot be defined.
Individuals are more perfect than the specific essence and thus have not solely a higher degree of unity, but also a greater degree of truth and goodness. God multiplied individuals to communicate to them His goodness and beatitude.[5]
In analytical philosophy, the meaning of "haecceity" shifted somewhat. Charles Sanders Peirce used the term as a non-descriptive reference to an individual.[6] Alvin Plantinga and other analytical philosophers used "haecceity" in the sense of "individual essence". The "haecceity" of analytical philosophers thus comprises not only the individuating differentia (the scholastic haecceity) but the entire essential determination of an individual (i.e., including that which the scholastics would call its quiddity).
Harold Garfinkel, the founder of ethnomethodology, used the term "haecceity", to emphasize the unavoidable and irremediable indexical character of any expression, behavior or situation. For Garfinkel indexicality was not a problem. He treated the haecceities and contingencies of social practices as a resource for making sense together. In contrast to theoretical generalizations, Garfinkel introduced "haecceities" in "Parson's Plenum" (1988), to indicate the importance of the infinite contingencies in both situations and practices for the local accomplishment of social order.[7] According to Garfinkel, members display and produce the social order they refer to within the setting that they contribute to. The study of practical action and situations in their "haecceities" — aimed at disclosing the ordinary, ongoing social order that is constructed by the members' practices[8] — is the work of ethnomethodology. Garfinkel described ethnomethodological studies as investigations of "haecceities", i.e.,
just thisness: just here, just now, with just what is at hand, with just who is here, in just the time that just this local gang of us have, in and with just what the local gang of us can make of just the time we need, and therein, in, about, as, and over the course of the in vivo work, achieving and exhibiting everything that those great achievements of comparability, universality, transcendentality of results, indifference of methods to local parties who are using them, for what they consisted of, looked like, the "missing what" of formal analytic studies of practical action.
— Harold Garfinkel, Lawrence D. Wieder, Two Incommensurable, Asymmetrically Alternate Technologies of Social Analysis, 1992, p. 203
Gilles Deleuze uses the term in a different way to denote entities that exist on the plane of immanence. The usage was likely chosen in line with his esoteric concept of difference and individuation, and critique of object-centered metaphysics.
Michael Lynch (1991) described the ontological production of objects in the natural sciences as "assemblages of haecceities", thereby offering an alternate reading of Deleuze and Guattari's (1980) discussion of "memories of haecceity" in the light of Garfinkel's treatment of "haecceity".[9]
Gerard Manley Hopkins drew on Scotus — whom he described as “of reality the rarest-veined unraveller”[10] — to construct his poetic theory of inscape.
James Joyce made similar use of the concept of haecceitas to develop his idea of the secular epiphany.[11]
James Wood refers extensively to haecceitas (as "thisness") in developing an argument about conspicuous detail in aesthetic literary criticism.[12]
The dictionary definition of haecceity at Wiktionary|
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