|Law of the Excluded Middle: an assertion is either true or false. "There is no third possibility."See also bivalence, anti-realism, multivalued logic.|
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Principle of the contingently (conditionally) excluded middle/Stalnaker/BSAD/Lewis: Thesis: either wX>wY or wX> w~Y applies in every world - it follows that if Y, Y", ... are a partition and X is possible, then - wX>wY, wX>wY", ..., would also be a partition. - Then the conjunctions of full patterns are a partition. - Vs: 1) applies to arbitrary selections.
2) cannot deal with random events. - LewisVsVs: despite coincidences there is nothing vague or arbitrary in the counterfactual conditionals - They are simply wrong in coincidences.
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