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Single Idea 8580

[filed under theme 7. Existence / D. Theories of Reality / 6. Physicalism ]

Full Idea

Final definition of 'Materialism': Among worlds where no natural properties alien to our world are instantiated, no two differ without differing physically; and two such worlds that are exactly alike physically are duplicates.

Gist of Idea

Materialism is (roughly) that two worlds cannot differ without differing physically

Source

David Lewis (New work for a theory of universals [1983], 'Min Mat')

Book Ref

'Properties', ed/tr. Mellor,D.H. /Oliver,A [OUP 1997], p.212

A Reaction

This would presumably allow for an anomalous monist/property dualist view of mind, but not full dualism. But if there are no psychophysical laws, what stops the mental changing while the physical remains the same?

The 33 ideas from 'New work for a theory of universals'

10717 Natural properties figure in the analysis of similarity in intrinsic respects [Lewis, by Oliver]
16217 Lewisian natural properties fix reference of predicates, through a principle of charity [Lewis, by Hawley]
7031 Lewis says properties are sets of actual and possible objects [Lewis, by Heil]
14499 Properties are classes of possible and actual concrete particulars [Lewis, by Koslicki]
15120 Lewisian properties have powers because of their relationships to other properties [Lewis, by Hawthorne]
21961 Physics aims to discover which universals actually exist [Lewis, by Moore,AW]
8576 The One over Many problem (in predication terms) deserves to be neglected (by ostriches) [Lewis]
8605 In addition to analysis of a concept, one can deny it, or accept it as primitive [Lewis]
8585 Reference partly concerns thought and language, partly eligibility of referent by natural properties [Lewis]
8613 Objects are demarcated by density and chemistry, and natural properties belong in what is well demarcated [Lewis]
8586 Natural properties tend to belong to well-demarcated things, typically loci of causal chains [Lewis]
8589 For us, a property being natural is just an aspect of its featuring in the contents of our attitudes [Lewis]
8615 We need natural properties in order to motivate the principle of charity [Lewis]
8614 A sophisticated principle of charity sometimes imputes error as well as truth [Lewis]
8608 Counterfactuals 'backtrack' if a different present implies a different past [Lewis]
15727 Physics aims for a list of natural properties [Lewis]
8607 Supervenience is reduction without existence denials, ontological priorities, or translatability [Lewis]
8606 A supervenience thesis is a denial of independent variation [Lewis]
8569 I suspend judgements about universals, but their work must be done [Lewis]
8611 A law of nature is any regularity that earns inclusion in the ideal system [Lewis]
8584 Causal counterfactuals must avoid backtracking, to avoid epiphenomena and preemption [Lewis]
8579 Psychophysical identity implies the possibility of idealism or panpsychism [Lewis]
8581 Physics discovers laws and causal explanations, and also the natural properties required [Lewis]
8580 Materialism is (roughly) that two worlds cannot differ without differing physically [Lewis]
15460 All perfectly natural properties are intrinsic [Lewis, by Lewis]
15726 Natural properties fix resemblance and powers, and are picked out by universals [Lewis]
8571 Universals are wholly present in their instances, whereas properties are spread around [Lewis]
8572 Any class of things is a property, no matter how whimsical or irrelevant [Lewis]
18433 There are far more properties than any brain could ever encodify [Lewis]
8604 We need properties as semantic values for linguistic expressions [Lewis]
8573 Most properties are causally irrelevant, and we can't spot the relevant ones. [Lewis]
8570 To have a property is to be a member of a class, usually a class of things [Lewis]
8574 Class Nominalism and Resemblance Nominalism are pretty much the same [Lewis]