- Lewis demonstrates the infeasibility of attempting a nonmodal1 reformulation of Anslem's ontological argument. The key premise in Anselm's famous argument is the claim that "Something exists in the understanding, than which nothing greater can be conceived."
- Lewis argues that the apparent credibility of the most promising, nonmodal2 rendering of this premise - viz. "There is an understandable being x, such that for no world w and being y does the greatness of y in w exceed the greatness of x in the actual world" - depends entirely on the illusion that the actuality of our world renders it "radically different from all other worlds - special in a way that makes it a fitting place of greatest greatness." This illusion becomes obvious once we accept perhaps the most notable claim in this paper, viz. Lewis's indexical account of actuality.
- The substantive postscript includes an important retraction (viz. that impossible worlds do not exist) and several interesting discussions (e.g., concerning the anthropic principle and the specter of skepticism).
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