Psychology Dictionary of Arguments

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Similarity: Similarity is the conformity of one or more - but not all - properties of two or more objects. See also Identity, Equality, Properties, Predicates, Predication, Identification, Descriptions.
Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments.

Author Concept Summary/Quotes Sources

David K. Lewis on Similarity - Dictionary of Arguments

IV 42
Similarity/Similarity Metric/Possible World/Lewis: problems: which aspects count, what importance do they have, how far can dissimilarity go?
V 46
Similarity/Possible World/Counterfactual Dependence/Lewis: the similarity relation between possible worlds should not require that miracles become necessary in differing possible worlds - SR/Similarity relation/Lewis: I do not think that they often guide our explicit judgment, but the overall similarity must be part of the desired similarity relation. - Congruence of local facts not important, but avoiding major violations of laws of nature. - E.g. small miracle: Nixon presses the button, but the signal is suppressed. - Big Miracle: In addition, all traces are blurred, Nixon’s memoirs are falsified, etc., i.e. the worlds become indistinguishable.
V 48
Small miracle: allows deviation. - Big Miracle: allows convergence. >Miracles/Lewis
V 49
Divergence is much easier to achieve than convergence - counterfactual asymmetry: exists, because the appropriate standards of similarity in turn are symmetric and in correspondence to the asymmetry of miracles.
V 53
This is certainly about the weighting of various similarities.
V 163f
Similarity/Possible world/Similarity metric/Lewis: actually three-digit relation. - w1 is closer to w than w2. - Similarities of facts balance each other against similarity of laws. - Similarity laws are important for the character of possible worlds - Similarity: We do not make the condition that there should be only one single next possible world or merely a next set. >Similarity metrics/Lewis, >possible worlds/Lewis.

Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution. Translations: Dictionary of Arguments
The note [Concept/Author], [Author1]Vs[Author2] or [Author]Vs[term] resp. "problem:"/"solution:", "old:"/"new:" and "thesis:" is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition.

Lewis I
David K. Lewis
Die Identität von Körper und Geist Frankfurt 1989

Lewis I (a)
David K. Lewis
An Argument for the Identity Theory, in: Journal of Philosophy 63 (1966)
Die Identität von Körper und Geist, , Frankfurt/M. 1989

Lewis I (b)
David K. Lewis
Psychophysical and Theoretical Identifications, in: Australasian Journal of Philosophy 50 (1972)
Die Identität von Körper und Geist, , Frankfurt/M. 1989

Lewis I (c)
David K. Lewis
Mad Pain and Martian Pain, Readings in Philosophy of Psychology, Vol. 1, Ned Block (ed.) Harvard University Press, 1980
Die Identität von Körper und Geist, , Frankfurt/M. 1989

Lewis II
David K. Lewis
"Languages and Language", in: K. Gunderson (Ed.), Minnesota Studies in the Philosophy of Science, Vol. VII, Language, Mind, and Knowledge, Minneapolis 1975, pp. 3-35
Handlung, Kommunikation, Bedeutung, Georg Meggle, Frankfurt/M. 1979

Lewis IV
David K. Lewis
Philosophical Papers Bd I New York Oxford 1983

Lewis V
David K. Lewis
Philosophical Papers Bd II New York Oxford 1986

Lewis VI
David K. Lewis
Convention. A Philosophical Study, Cambridge/MA 1969
German Edition:
Konventionen Berlin 1975

Clarence Irving Lewis
Collected Papers of Clarence Irving Lewis Stanford 1970

LewisCl I
Clarence Irving Lewis
Mind and the World Order: Outline of a Theory of Knowledge (Dover Books on Western Philosophy) 1991

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