Philosophy Lexicon of Arguments

Determinism, philosophy: the idea that events and mental states occur due to strict laws and are therefore determined in advance. For a prediction one only has to know the environmental conditions. The fact that we do not know if determinism is true is sometimes explained by our incomplete knowledge of the environment. See also indeterminism, strict laws, prediction, probability, probabilism.
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Lewis V 37
Definiton determinism/Possible worlds/Lewis: if two worlds obey the laws perfectly, then they are either exactly the same all the time or in no two time sections equal. For the sake of the argument, let us assume that the laws of nature are deterministic.
My definition of determinism stems from Montague, but diverges from it in two points:
1. I avoid his mathematical construction of ersatzworlds (substitute worlds ((s) = sets of sentences)).
2. I take temporal equality of worlds as a simple relation. Montague instead takes the relation, to have the same complete description in a particular language as a basic relation, which he leaves unspecified.
My definition presupposes that we can identify different time segments from one world to another.

D. Lewis
Die Identität von Körper und Geist Frankfurt 1989

D. Lewis
Konventionen Berlin 1975

D. Lewis
Philosophical Papers Bd I New York Oxford 1983

D. Lewis
Philosophical Papers Bd II New York Oxford 1986

LwCl I
Cl. I. Lewis
Mind and the World Order: Outline of a Theory of Knowledge (Dover Books on Western Philosophy) 1991

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Ed. Martin Schulz, access date 2017-05-23