|David K. Lewis: a thought experiment concerning two omniscient gods (omniscient with respect to propositions). None of them knows who he is because that is not comprehensible in propositions. Self-knowledge is not propositional knowledge. (D.K. Lewis Philosophical Papers Vol. I 1983, p 139ff)|
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|Two Omniscient Gods||I 275
Gods-Exampe/Example Two Omniscient Gods/Lewis/Stalnaker: Version: inverted spectra - Castor: has the experience ph-red - Knowledge/Castor: Castor knows that red things look ph-red for Castor. And he knows, because of the inversion, that the same things look ph-green for Pollux - Pollux: has the experience ph-green ((s) with the same object) - This experience/problem: Castor does not know if this experience is for him ph-red or ph-green, because he does not know whether red things look for him ph-red or ph-green - If this is supposed to be omniscience, then it does not imply phenomenal distinguishability - variant: Assuming there is nothing green in the world - then both are in the same situation as Mary - and each will remain in this position, even if all came to know which God they are - they do not know what it’s like to have this experience.
Ways a World may be Oxford New York 2003