Ideas from 'Concepts without Boundaries' by Mark Sainsbury [1990], by Theme Structure

[found in 'Vagueness: a Reader' (ed/tr Keefe,R /Smith,P) [MIT 1999,0-262-61145-7]].

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7. Existence / D. Theories of Reality / 10. Vagueness / b. Vagueness of reality

8983	If 'red' is vague, then membership of the set of red things is vague, so there is no set of red things

7. Existence / E. Categories / 2. Categorisation

8986	We should abandon classifying by pigeon-holes, and classify around paradigms

9. Objects / B. Unity of Objects / 3. Unity Problems / e. Vague objects

8982	Vague concepts are concepts without boundaries

8984	If concepts are vague, people avoid boundaries, can't spot them, and don't want them

8985	Boundaryless concepts tend to come in pairs, such as child/adult, hot/cold