Combining Texts

All the ideas for 'Idealism: a critical survey', 'De Mundo Praesenti' and 'The Structure of Science'

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5 ideas

7. Existence / C. Structure of Existence / 2. Reduction

3425	Reduction has been defined as deriving one theory from another by logic and maths [Nagel,E, by Kim]
	Full Idea: Ernest Nagel defines reduction as the possibility of deriving all laws of one theory by logic and mathematics to another theory, with appropriate 'bridging principles' (either definitions, or empirical laws) connecting the expressions of the two theories.
	From: report of Ernest Nagel (The Structure of Science [1961]) by Jaegwon Kim - Philosophy of Mind p.213
	A reaction: This has been labelled as 'weak' reduction, where 'strong' reduction would be identity, as when lightning is reduced to electrical discharge. You reduce x by showing that it is y in disguise.

8. Modes of Existence / C. Powers and Dispositions / 4. Powers as Essence

12714	The substantial form is the principle of action or the primitive force of acting [Leibniz]
	Full Idea: The substantial form is the principle of action or the primitive force of acting.
	From: Gottfried Leibniz (De Mundo Praesenti [1686], A6.4.1507-8), quoted by Daniel Garber - Leibniz:Body,Substance,Monad 3
	A reaction: The clearest statement of the modification of Aristotle's hylomorphism which Leibniz preferred in his middle period, and which strikes me as an improvement, and about right. Shame that monads got too much of a grip on him, but he was trying to dig deeper.

9. Objects / D. Essence of Objects / 1. Essences of Objects

12743	A true being must (unlike a chain) have united parts, with a substantial form as its subject [Leibniz]
	Full Idea: In a Being one per se a real union is required consisting not in the situation or motion of parts, as in a chain or a house, but in a unique individual principle and subject of attributes and operations, in us a soul and in a body a substantial form.
	From: Gottfried Leibniz (De Mundo Praesenti [1686], A6.4.1506), quoted by Daniel Garber - Leibniz:Body,Substance,Monad 7
	A reaction: Leibniz is said not to be an essentialist, by making all properties essential, but he is certainly committed to substance, and it sounds like essence here (or one view of essence), when it makes identity possible. This idea is pure Aristotle.

13. Knowledge Criteria / B. Internal Justification / 5. Coherentism / b. Pro-coherentism

21513	We can no more expect a precise definition of coherence than we can of the moral ideal [Ewing]
	Full Idea: I think it is wrong to tie down the advocates of the coherence theory to a precise definition. ...It would be altogether unreasonable to demand that the moral ideal should be exhaustively defined, and the same may be true of the ideal of thought.
	From: A.C. Ewing (Idealism: a critical survey [1934], p.231), quoted by Erik J. Olsson - Against Coherence 7.6
	A reaction: I strongly agree. It is not a council of despair. I think the criteria of coherence can be articulated quite well (e.g by Thagard), and the virtues of enquiry can also be quite well specified (e.g. by Zagzebski). Very dissimilar evidence must cohere.

13. Knowledge Criteria / B. Internal Justification / 5. Coherentism / c. Coherentism critique

21497	If undetailed, 'coherence' is just a vague words that covers all possible arguments [Ewing]
	Full Idea: Without a detailed account, coherence is reduced to the mere muttering of the word 'coherence', which can be interpreted so as to cover all arguments, but only by making its meaning so wide as to rob it of almost all significance.
	From: A.C. Ewing (Idealism: a critical survey [1934], p.246), quoted by Erik J. Olsson - Against Coherence 2.2
	A reaction: I'm a fan of coherence, but it is a placeholder, involving no intrinsic or detailed theory. I just think it points to the reality of how we make judgements, especially practical ones. We can categorise the inputs, and explain the required virtues.