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- Path: sparky!uunet!ogicse!das-news.harvard.edu!husc-news.harvard.edu!husc10.harvard.edu!zeleny
- From: zeleny@husc10.harvard.edu (Michael Zeleny)
- Newsgroups: sci.logic
- Subject: Re: Impredicativity - was: Russell's Paradox
- Summary: more meaningless banter on both sides
- Message-ID: <1992Nov5.125708.17138@husc3.harvard.edu>
- Date: 5 Nov 92 17:57:07 GMT
- Article-I.D.: husc3.1992Nov5.125708.17138
- References: <1992Nov4.073717.22625@CSD-NewsHost.Stanford.EDU>
- <1992Nov4.134534.17092@husc3.harvard.edu> <1992Nov5.004725.8252@CSD-NewsHost.Stanford.EDU>
- Organization: The Phallogocentric Cabal
- Lines: 110
- Nntp-Posting-Host: husc10.harvard.edu
-
- WARNING:
-
- The substantive logic content of this article is extremely low.
-
-
-
- If you are looking for meaningful conversation, you have to look elsewhere.
-
-
-
- Very well, -- you can't complain now.
-
- In article <1992Nov5.004725.8252@CSD-NewsHost.Stanford.EDU>
- pratt@Sunburn.Stanford.EDU (Vaughan R. Pratt) writes:
-
- >In article <1992Nov4.134534.17092@husc3.harvard.edu>
- >zeleny@husc10.harvard.edu (Michael Zeleny) writes:
-
- Bill Taylor:
- >>>>The slick form of AF, that every nonempty set has a member disjoint from it,
-
- Vaughan Pratt:
- >>>Where is this form given?
-
- MZ:
- >>Most everywhere [...]
-
- VP:
- >>> And why doesn't it rule out Omega = {Omega}?
- >>>(Just asking, I'm not expert on this stuff.)
-
- MZ:
- >>Neither am I, but that will not prevent me from being charitable
- >>enough to let you answer your own question.
-
- VP:
- >Why, do you turn in all your Usenet posts along with your tax return?
-
- In a sense, I already do that, but if you should continue asking the
- sort of questions exemplified above, I just might have to send them
- with a bill to the Stanford School of Continuing Education.
-
- VP:
- >Actually it's just me being dense (and Bill being nonstandard). I took
- >Bill's AF to mean AntiFoundation when he meant Axiom of Foundation
- >(whence he *meant* to rule out Omega={Omega}). I should have figured
- >that out sooner (broken enough eggs in the past two days to start an
- >omelette parlor).
-
- Bill's abbreviation was not only reasonably standard, but also well
- supported by the context. I think an unequivocal admission of error
- would look better than this craven Reaganite fishing for excuses.
-
- MZ:
- >>[...] e.g. in Drake (_Set Theory_), whose pithy comments on
- >>the Axiom of Replacement (a.k.a. the `F' in `ZFC') will go a long way
- >>toward disabusing you of your wacky revisionist notions.
-
- VP:
- >Thank god. I've been posting wacky messages for weeks and no one seems
- >to have noticed till now. How do you do it?
-
- I use the Principle of Charity. In any case, as I told you on another
- occasion, I do not use the term `wacky' in a pejorative sense.
-
- VP:
- >But let's get our facts straight on what I'm proposing to revise. I
- >haven't lifted a finger against Replacement, in fact I need it to make
- >money with it by 2012 (come on, Replacement, come on, be strong for
- >me!).
-
- I was referring to your prattle on the subject of Replacement, as
- replicated elsewhere.
-
- MZ:
- >>Some _philosophical_ reservations concerning Replacement can be made
- >>from a generic Limitation of Size standpoint, -- right now I do not
- >>have the references, but they are likely to be found in Maddy's JSL
- >>expository articles on the ZFC axioms. However, from the more refined
- >>standpoint of the cumulative hierarchy, Drake more or less has the
- >>last word.
-
- VP:
- >Again, I'm not in the market to be talked out of Replacement, or talk
- >anyone out of it. Foundation on the other hand seems as pointless as
- >the cumulative hierarchy: each needs the other and neither seems to be
- >much use to the rest of mathematics. Now who can you point me at with
- >a convincing pitch for Foundation?
-
- Fraenkel and Co have the standard argument replete with additional
- references.
-
- MZ:
- >>Always looking for
- >>logico-philosophical esoterica, Italian motorcycle parts, Swiss
- >>firearms, or XVIIIth century French smut.
-
- VP:
- >Oh. Guess that answers my second last question. :-)
-
- Not to insinuate anything concerning your recent performance on
- sci.math, but your own prosaic wackiness hardly *measures* up to
- the rambunctuous rantings of the divine marquis.
-
- >--
- >Vaughan Pratt There's no truth in logic, son.
-
- cordially,
- mikhail zeleny@husc.harvard.edu
- "Un de mes plus grands plaisirs est de jurer Dieu quand je bande."
-