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Ideas for 'fragments/reports', 'Aristotelian commentaries' and 'Our Knowledge of the External World'

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2 ideas

12. Knowledge Sources / B. Perception / 2. Qualities in Perception / b. Primary/secondary

16720	Secondary qualities come from temperaments and proportions of primary qualities [Conimbricense]
	Full Idea: Colors, flavours, smells, and other secondary qualities arise from the various temperaments and proportions of the primary qualities.
	From: Collegium Conimbricense (Aristotelian commentaries [1595], I.10.4 Gen&C), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 21.2
	A reaction: This is a bit more subtle than merely mixing the primary qualities. What about the powers of the primary qualities? Presumably that is the 'temperaments'?

12. Knowledge Sources / B. Perception / 4. Sense Data / c. Unperceived sense-data

21583	When sense-data change, there must be indistinguishable sense-data in the process [Russell]
	Full Idea: In all cases of sense-data capable of gradual change, we may find one sense-datum indistinguishable from another, and that indistinguishable from a third, while yet the first and third are quite easily distinguishable.
	From: Bertrand Russell (Our Knowledge of the External World [1914], 5)
	A reaction: This point is key to the sense-data theory, because it gives them independent existence, standing between reality and subjective experience. It is also the reason why they look increasingly implausible, if they may not be experienced.