Fictionalism is the view in philosophy according to which statements that appear to be descriptions of the world should not be construed as such, but should instead be understood as cases of "make believer", of pretending to treat something as literally true (a "useful fiction"). Two important strands of fictionalism are modal fictionalism developed by Gideon Rosen, which states that possible worlds, regardless of whether they exist or not, may be a part of a useful discourse, and mathematical fictionalism advocated by Hartry Field, which states that talk of numbers and other mathematical objects is nothing more than a convenience for doing science. Also in meta-ethics, there is an equivalent position called moral fictionalism. Many modern versions of fictionalism are influenced by the work of Kendall Walton in aesthetics.
Fictionalism consists in at least the following three theses:
- Claims made within the domain of discourse are taken to be truth-apt; that is, true or false.
- The domain of discourse is to be interpreted at face value--not reduced to meaning something else.
- The aim of discourse in any given domain is not truth, but some other virtue(s) (e.g., simplicity, explanatory scope).
 See also
 Further reading
- Balaguer, Mark (1998). Platonism and Anti-Platonism in Mathematics. Oxford: Oxford University Press. ISBN 978-0-19-514398-0.
- Kalderon, Mark (2005). Moral Fictionalism. Oxford: Clarendon Press. ISBN 978-0-19-927597-7.
- Modal Fictionalism entry by Daniel Nolan in the Stanford Encyclopedia of Philosophy, 2007-12-11
- Fictionalism entry by Matti Eklund in the Stanford Encyclopedia of Philosophy, 2007-03-30
- Mathematical fictionalism entry by Mark Balaguer in the Stanford Encyclopedia of Philosophy, 2008-04-22
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