Combining Texts

All the ideas for 'Philosophical Explanations', 'Comment on Armstrong and Forrest' and 'The Evolution of Physics'

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5 ideas

8. Modes of Existence / D. Universals / 1. Universals

15453	The main rivals to universals are resemblance or natural-class nominalism, or sparse trope theory [Lewis]
	Full Idea: The leading rivals to a theory of universals are resemblance or natural-class nominalism, or sparse trope theory.
	From: David Lewis (Comment on Armstrong and Forrest [1986], p.110)
	A reaction: If that is the complete menu, I choose resemblance nominalism. All discussion of properties in terms of classes is wildly misguided (because properties come first). Why not 'natural' tropes?

9. Objects / C. Structure of Objects / 1. Structure of an Object

15452	We could not uphold a truthmaker for 'Fa' without structures [Lewis]
	Full Idea: We could not, without structures, uphold the principle that every truth has a truthmaker. If Fa is true, the truthmaker is not F, not a, nor both together; not their mereological sum; not a set-theoretic construction. These would exist just the same.
	From: David Lewis (Comment on Armstrong and Forrest [1986], p.109)
	A reaction: This point ought to trouble Lewis, as well as Armstrong and Forrest. If we assert 'Fa', we must (in any theory) have some idea of what unites them, as well as of their separate existence. It must a fact about 'a', not a fact about 'F'.

11. Knowledge Aims / A. Knowledge / 4. Belief / c. Aim of beliefs

3570	Maybe knowledge is belief which 'tracks' the truth [Nozick, by Williams,M]
	Full Idea: Nozick suggests that knowledge is just belief which 'tracks the truth' (hence leaving out justification).
	From: report of Robert Nozick (Philosophical Explanations [1981]) by Michael Williams - Problems of Knowledge Ch. 2

13. Knowledge Criteria / C. External Justification / 4. Tracking the Facts

2748	A true belief isn't knowledge if it would be believed even if false. It should 'track the truth' [Nozick, by Dancy,J]
	Full Idea: Nozick says Gettier cases aren't knowledge because the proposition would be believed even if false. Proper justification must be more sensitive to the truth ("track the truth").
	From: report of Robert Nozick (Philosophical Explanations [1981], 3.1) by Jonathan Dancy - Intro to Contemporary Epistemology 3.1
	A reaction: This is a bad idea. I see a genuine tree in my garden and believe it is there, so I know it. That I might have believed it if I was in virtually reality, or observing a mirror, won't alter that.

27. Natural Reality / B. Modern Physics / 2. Electrodynamics / b. Fields

18202	The concept of a field gradually replaced the substances in explaining relations between charges [Einstein/Infeld]
	Full Idea: In the beginning the field concept was no more than a means of facilitating the understanding of phenomena. ...In the new field language it is the field and not the charges themselves which is essential. The substance was overshadowed by the field.
	From: Einstein,A/Infeld,L (The Evolution of Physics [1938], p.151), quoted by Penelope Maddy - Naturalism in Mathematics II.4
	A reaction: This is very important for philosophical metaphysicians, especially those like me who want to explain the universe by the nature of the stuff that composes it. The 'stuff' had better not be simplistic individual 'substances'.