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In Aristotle's view, universals can be instantiated multiple times. He states that one and the same universal, such as applehood, appears in every real apple.A common sense challenge would be to inquire what remains exactly the same in all these different things, since the theory is claiming that something remains the same.
Aristotle said that predication can be kath hauto when the predicated universal identifies the subject as what it is, marking this type as de re necessary. [ 23 ] [ 24 ] It is distinguished from kata sumbebekos predication, which is concerned with how-predication or when the predicated universal merely modifies or characterizes a subject that ...
A biologist can study oak trees and learn about oakness and more generally the intelligible order within the sensible world. Accordingly, Aristotle was more confident than Plato about coming to know the sensible world; he was a prototypical empiricist and a founder of induction. Aristotle was a new, moderate sort of realist about universals.
The standpoint of the Aristotelian classification is the predication of one universal concerning another. The Porphyrian, by introducing species, deals with the predication of universals concerning individuals (for species is necessarily predicated of the individual), and thus created difficulties from which the Aristotelian is free (see below).
Platonic Forms were the first universals posited as such in philosophy. [7] Our term "universal" is due to the English translation of Aristotle's technical term katholou which he coined specially for the purpose of discussing the problem of universals. [8] Katholou is a contraction of the phrase kata holou, meaning "on the whole". [9]
Universals without instances are not part of the world. [37] Taking a realist approach to universals also allows an Aristotelian realist philosophy of mathematics, according to which mathematics is a science of properties that are instantiated in the real (including physical) world, such as quantitative and structural properties. [38]
The ness-ity-hood principle is used mainly by English-speaking philosophers to generate convenient, concise names for universals or properties. [9] According to the Ness-Ity-Hood Principle, a name for any universal may be formed by taking the name of the predicate and adding the suffix "ness", "ity", or "hood".
Thus, they accepted Anaxagoras's idea (as did Aristotle) that if an object is hot, it is because some part of a universal heat body had entered the object. But, unlike Aristotle, they extended the idea to cover all chance incidents. Thus, if an object is red, it would be because some part of a universal red body had entered the object.