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- Newsgroups: sci.logic
- Path: sparky!uunet!spool.mu.edu!agate!linus!linus.mitre.org!linus!guttman
- From: guttman@circe.mitre.org (Joshua D. Guttman)
- Subject: Re: Liar paradox
- In-Reply-To: pwestlak@eoe.co.uk's message of 16 Dec 92 18:16:54 GMT
- Message-ID: <GUTTMAN.92Dec16164336@circe.mitre.org>
- Sender: news@linus.mitre.org (News Service)
- Nntp-Posting-Host: circe.mitre.org
- Organization: The MITRE Corporation, Bedford, MA 01730
- References: <1476@eouk13.eoe.co.uk>
- Date: Wed, 16 Dec 1992 21:43:36 GMT
- Lines: 29
-
- In article <1476@eouk13.eoe.co.uk> pwestlak@eoe.co.uk (Peter Westlake) writes:
-
- Please forgive me if this is a naive question (or even completely stupid :-)
-
- The way I have heard the original Cretan liar paradox expressed is that
- Epiminedes, a Cretan, said "All Cretans are liars". The reasoning goes that
- as Epiminedes is known to be from Crete, he therefore claims to be a liar,
- and therefore claims not to be, which is a paradox. But it seems to me
- (in my ignorance) that this statement permits a consistent interpretation,
- namely that SOME Cretans are liars, and that Epiminedes is one of them.
- By supposing the existence of other Cretans, we avoid a paradox.
-
- So a) I have the original statement wrong
- or b) it never was a paradox really
- or c) I have missed something obvious and everything I say is false.
- Break it to me gently, especially if I have misspelled "Epi.*".
-
-
- I think you misspelled Epimenides, but you're right about it's not being
- paradoxical, as stated. I think that his statement was enough to make people
- realize, though, that something very similar was going to be really paradoxical
- ("This very sentence is false").
-
- Kripke, who's always entertaining, says that the statement is quoted by St.
- Paul in one of the Epistles, who writes that Epimenides, even one of their own,
- states that all Cretans are liars. St Paul adds, "This testimony is true."
- Paul seems to have missed the logical subtlety here.
-
- Joshua Guttman
-