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- Newsgroups: sci.logic
- Path: sparky!uunet!stanford.edu!CSD-NewsHost.Stanford.EDU!Sunburn.Stanford.EDU!pratt
- From: pratt@Sunburn.Stanford.EDU (Vaughan R. Pratt)
- Subject: Re: Impredicativity - was: Russell's Paradox
- Message-ID: <1992Nov5.170056.21983@CSD-NewsHost.Stanford.EDU>
- Sender: news@CSD-NewsHost.Stanford.EDU
- Organization: Computer Science Department, Stanford University.
- References: <1992Nov4.134534.17092@husc3.harvard.edu> <1992Nov5.004725.8252@CSD-NewsHost.Stanford.EDU> <TORKEL.92Nov5100828@isis.sics.se>
- Date: Thu, 5 Nov 1992 17:00:56 GMT
- Lines: 13
-
- In article <TORKEL.92Nov5100828@isis.sics.se> torkel@sics.se (Torkel Franzen) writes:
- >What I am interested in is whether or not you can explain what
- >you are talking about, as has been done with the "standard" theory of
- >non-well-founded sets (in that case by giving a model of the theory in ordinary
- >mathematics).
-
- My interpretation of the intertranslatability of ZF with FA or AFA is
- that any argument such as mine in favor of one or the other can only
- find support outside ZF, e.g. in psychology or esthetics. I find an
- AFA world very appealing, but clearly it's not for everyone. I claim
- no more.
- --
- Vaughan Pratt There's no truth in logic, son.
-