Lexicon of Arguments

 Philosophical and Scientific Issues in Dispute
 
[german]


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Theses I
Theses II

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V 5f
Comparison/possible world/similarity/similarity metrics/difference/Lewis: Two possible worlds never differ in only a fact; if at all, then there is immediately an infinite number of differences.
Analysis 1: only one most similar world.
LewisVs: E.g. Bizet/Verdi: two equally similar worlds: both French/Italian - the next (closest) world does not exist! - Analysis 2: several similar possible worlds.
Solution: van Fraassen: Supervaluation: arbitrarily chosen next world.
V 21
Comparison/Counter comparison/counterfactual conditional/triple indexing/Lewis: If my yacht had been longer, I would have been happier. - 2nd World j: my yacht is longer than in i (1st World) - 3) every additional world where both is true is closer than one where the yacht is longer, but I am still not happier. - (Always in relation to the 1st World i).
>Possible world/Lewis, >Similarity/Lewis, >Similarity metrics/Lewis, >Comparability.

- - -
Explanation/(s):
E.g., The Bizet/Verdi case: They could have been compatriots if
a) Bizet had been Italian or
b) Verdi had been French.
Problem: Which world is closer to our world? Therefore a similarity metric for possible worlds is not achievable.

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