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Strict implication/Lewis (here actually CoCo, counterfactual conditionals) would allow no exceptions - Example: if I had not worked, nothing happens, but if we both ... then yes - but: if someone third had worked more so, nothing would have happened ... etc.. - Would not be possible with strict implication - possible worlds/counterfactual conditional here means that we consider only the nearest worlds._____________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.
Die Identität von Körper und Geist Frankfurt 1989
Konventionen Berlin 1975
Philosophical Papers Bd I New York Oxford 1983
Philosophical Papers Bd II New York Oxford 1986
Cl. I. Lewis
Mind and the World Order: Outline of a Theory of Knowledge (Dover Books on Western Philosophy) 1991