A classification of closure concepts
Closure has been used in various ways. I propose a classification based on the specification hierarchy formalism, wherein ideas are represented as subclasses, or restrictions, of other ideas, beginning with the most generally applicable concept and working inward to more particular applications. This exercise is part of a revival of nineteenth century natural philosophy. The classification also represents a self-referential developmental system in which the classification itself emerges from the evolutionary process it describes. Since one form of closure builds upon a previously attained form, development traces a loss of evolutionary potential even as each closure gives access into a new, emergent, realm.
Salthe
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Binghamton University, New York, USA. ssalthe@binghamton.edu