Version: v1, Published online: 1998
Retrieved March 20, 2019, from https://www.rep.routledge.com/articles/thematic/substance/v-1
For Aristotle, ‘substances’ are the things which exist in their own right, both the logically ultimate subjects of predication and the ultimate objects of scientific inquiry. They are the unified material objects, as well as the natural stuffs, identifiable in sense-experience, each taken to be a member of a natural species with its ‘form’ and functional essence. Entities in other categories – qualities, actions, relations and so forth – are treated as dependent on, if not just abstracted aspects of, these independent realities.
With the rise of mechanistic physics in the seventeenth century, the Aristotelian multiplicity of substances was reduced to universal matter mechanically differentiated. This move sharpened the issue of the relation of mind to the physical world. The consequent variety of ways in which the notion of substance was manipulated by materialists, dualists, immaterialists and anti-dogmatists encouraged later scepticism about the distinction between independent realities and human abstractions, and so idealism.
Twentieth-century conceptualism, like some earlier versions of idealism, rejects the distinction altogether, commonly ascribing the logical priority of material things in natural language to the utility of a folk physics, as if they were the theoretical entities of everyday life. As such, their identity and existence are determined only through applications of a theory outdated by modern science. Yet this ‘top-down’, holistic philosophy of language is belied by the detailed insights of traditional logic, which point clearly to a ‘bottom-up’ account of classification and identity, that is an account which recognizes the possibility of perceptually picking out material objects prior to knowledge of their kind or nature, and of subsequently classifying them. The idea that material things are theoretical entities, and that their individuation is accordingly kind-dependent, is a hangover from an atomistic approach to perception which calls on theory to tie sensory information together. A more accurate understanding of sensation as the already integrated presentation of bodies in spatial relations to one another and to the perceiver is consonant with the possibility denied by the idealist– namely, that, with respect to its primitive referents, language and thought are shaped around reality itself, the independent objects given in active sense-experience. That the coherence or discrete unity of material objects has a physical explanation does not mean that physics explains it away.
Ayers, Michael. Substance, 1998, doi:10.4324/9780415249126-N056-1. Routledge Encyclopedia of Philosophy, Taylor and Francis, https://www.rep.routledge.com/articles/thematic/substance/v-1.
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