Ideas from 'The Nature of Things' by Anthony Quinton [1973], by Theme Structure

[found in 'The Nature of Things' by Quinton,Anthony [RKP 1973,0-7100-7453-0]].

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4. Formal Logic / F. Set Theory ST / 7. Natural Sets
A class is natural when everybody can spot further members of it
7. Existence / E. Categories / 5. Category Anti-Realism
Extreme nominalists say all classification is arbitrary convention
8. Modes of Existence / B. Properties / 5. Natural Properties
The naturalness of a class depends as much on the observers as on the objects
Properties imply natural classes which can be picked out by everybody
8. Modes of Existence / D. Universals / 4. Uninstantiated Universals
Uninstantiated properties must be defined using the instantiated ones
9. Objects / A. Existence of Objects / 4. Individuation / b. Individuation by properties
An individual is a union of a group of qualities and a position