Combining Texts

Ideas for 'fragments/reports', 'Coming-to-be and Passing-away (Gen/Corr)' and 'The World'

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2 ideas

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

16717	Which of the contrary features of a body are basic to it? [Aristotle]
	Full Idea: What sorts of contrarities, and how many of them, are to be accounted 'originative sources' of body?
	From: Aristotle (Coming-to-be and Passing-away (Gen/Corr) [c.335 BCE], 329b04)
	A reaction: Pasnau says these pages of Aristotle are the source of the doctrine of primary and secondary qualities. Essentially, hot, cold, wet and dry are his four primary qualities.

12. Knowledge Sources / B. Perception / 2. Qualities in Perception / d. Secondary qualities

22593	Our sensation of light may not be the same as what produces the sensation [Descartes]
	Full Idea: There can be a difference between our sensation of light and what is in the objects that produce that sensation in us.
	From: René Descartes (The World [1631]), quoted by Ian Dunt - How to be a Liberal 1
	A reaction: Note only that they 'may' differ, and that he does not assert that they are entirely different. Secondary qualities give information, and are not just mental events.