(Greek kategoría, accusation, attribution).
The term was transferred by Aristotle from its forensic meaning (procedure in legal accusation) to its logical use as attribution of a subject. The Latin equivalent, prædicamentum, given it by Boethius, aptly suggests its technical significance. The categories or predicaments are the most widely generic classes or groups of predicates applicable to an individual Subject-- summa genera prædicatorum. Whether Aristotle originally intended them as aspects and divisions of words, of ideas, or of things is a debated question. Nevertheless they lend themselves readily to each of these subjects. They are divisions:
Since it is the business of philosophy to reduce the world of real beings--the self included--to its simplest terms or aspects and their orderly relations, the task of discovering and defining the corresponding categories has been attempted by every philosopher of note. The results, however, have been by no means identical. Thus we find the Indian sage, Kanada, the reputed founder of the Vaiseshika philosophy, reducing all things to substance, quality, action, generality particularity, co-inherence, and non-existence, while the Greek (supposed) author of the word philosophy, Pythagoras, discovers twenty ultimate groups, ten of which he calls good and the opposite ten bad. Plato in turn subsumes all things under being, identity, diversity, change. In modern times Descartes and Leibniz arranged seven categories: mind (spirit), matter (body), measure, shape, rest, motion, position, while Kant, basing his division on the varieties of judgment, invented twelve categories or forms under which he makes the intellect (Verstand) judge of all objects of experience. Aristotle's classification of ten categories which was taken up into Scholasticism, and still holds its place in the logic and ontology of Catholic philosophy, is thus set forth in the fourth chapter of the "Organon":of things in-complex enunciated (i.e. simple predicates), each signifies either substance or quantity or quality or relation or where (place) or when (time) or position or possession or action or passion. But substance is to speak generally as ' man ', 'horse'; quantity as 'two' or 'three cubits'; quality as 'white'; relation as 'greater'; where as 'in the Forum'; when as 'yesterday'; position as 'he sits'; possession as 'he is shod '; action as 'he cuts '; passion as 'he burns'.
Of these groups substance, quantity, quality and relation are obviously the principal; the remaining six are reducible to some form of relation, for it should be noted that between some of the categories a real distinction is not required; a virtual, i.e. an objectively founded mental distinction suffices, as, e.g., between action and passion. The object or thing divided into the categories is:
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