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| Summary | When an ontologist asks "what exists?," a meta-question may soon follow: What is meant by 'exists'? Quine's influential view is that 'exist' should be regimented as an existential quantifier, so that our ontological commitments are determined by the range of the quantifier, within our best scientific theory. In opposition, Carnap held that some existential statements are not ontologically committing. E.g., the statement 'There is an even prime' (if meaningful at all) is merely true by definition within the "mathematics framework." That is so, even though the sentence may be false in, say, the framework of evolutionary biology. Accordingly, for Carnap to "exist" is a pluralistic affair, relativized to a framework. Beyond the Quine-Carnap debate, other issues regarding existence include the classic question "Why is there anything at all?" as well as the riddle of non-being: "There exist things that do not exist" seems true, thanks to Pegasus, unicorns, etc. Yet why isn't this a contradiction? Finally, and relatedly, some have suggested that there are different "ways of being," i.e., that there is more than one way to exist. Whether this is tenable is currently receiving much attention in the literature. |
| Key works | The debate between Quine 1948 and Carnap 1950 is essential reading. Also, Sider 2011 is a neo-Quinean who has debated the neo-Carnapian Hirsch 2010. See in addition the neo-Quineanism of van Inwagen 1998, and the neo-Carnapianism of Hofweber 2005. A middle way is forged by Azzouni 2004; Azzouni 2007: His view is that (contra Carnap) 'exist' is not framework-relative, but (contra Quine) 'exist' should be regimented as a predicate and that it ordinarily does not express genuine ontological commitment. Post 1987 is excellent on disambiguating "why does the universe exist?;" see also Parfit 1992 for an overview of possible ways to answer the question. On nonexistence, Meinong 1960 and the response in Russell 1905 are must reads--and more recent pieces include Zalta 1988, Salmon 1998, Sainsbury 2005, and Kripke forthcoming. On "ways of being," Spencer 2012 provides a nice overview of the current literature. Two other key works on existence are Salmon 1987, and Lewis 1986 on existence vs. actuality. |
| Introductions | Recommended introductions are Nelson 2012, Reicher 2008, and Sorensen 2008. |
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