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Knowledge / Lewis / Stalnaker: Conclusion: Knowledge of actual things is determined, not because it is causal knowledge, but because it is indexical knowledge. That is not knowledge of the existence, but of the fact that we are in a certain relation to things - punch line: therefore all impersonal ontological beliefs is justified by a priori reasons. This will not be accepted by many authors.
Fact / unknown / knowledge / truth value / Stalnaker: E.g. "Julius was the inventor of the zipper." - Establishes an unknown fact. - We know by virtue of our designation, that it is true, although we do not know the fact. - (Because we do not know who is Julius). - Reference of names: depends on facts.
Ways a World may be Oxford New York 2003