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- Xref: sparky rec.arts.books:23316 sci.philosophy.tech:4618
- Path: sparky!uunet!cs.utexas.edu!rutgers!hsdndev!husc-news.harvard.edu!husc10.harvard.edu!zeleny
- From: zeleny@husc10.harvard.edu (Michael Zeleny)
- Newsgroups: rec.arts.books,sci.philosophy.tech
- Subject: Re: A note on Modal Logic that has nothing to do with Ikky Sex
- Message-ID: <1992Dec26.153516.18845@husc3.harvard.edu>
- Date: 26 Dec 92 20:35:15 GMT
- References: <1gt01uINNrmn@cat.cis.Brown.EDU> <1992Dec22.163049.18787@husc3.harvard.edu> <1h84e6INNhq@cat.cis.Brown.EDU>
- Organization: The Phallogocentric Cabal
- Lines: 146
- Nntp-Posting-Host: husc10.harvard.edu
-
- In article <1h84e6INNhq@cat.cis.Brown.EDU>
- PL436000@brownvm.brown.edu (Jamie) writes:
-
- >>Posted on 22 Dec 1992 at 16:30:47 by Michael Zeleny
-
- MZ:
- >>In fact, I glossed over an important detail in my argument. A language
- >>may be semantically closed, in the sense of containing intensional
- >>meaning predicates applying to (the senses of) its own expressions, and
- >>yet remain consistent.
-
- J:
- >Well, actually, I would have thought it was fairly obvious that
- >a language can do that. So long as it doesn't have TOO many
- >of those predicates. For example, a language could contain
- >its own truth predicate but not its own falsity predicate.
-
- Correct, on the assumption that it is limited to Hilbertian positive
- logic. (I feel some qualms about this attribution, -- exactly how
- much of the work in logic, historically associated with his name, was
- actually done by Hilbert himself?)
-
- J:
- >(It is a popular misconception that Tarski showed a language
- >cannot contain its own truth predicate. Even for smooth,
- >stratification-free languages, it is pretty obvious that
- >he showed only that none can contain its own FALSITY
- >predicate. Even then, of course, only that no language
- >with at least the expressive power of arithmetic cannot....)
-
- As in the case of G\"odel's results, the expressive power of
- arithmetic can be dispensed with, in favor of the quotation function.
-
- J:
- >>>A figurative circumlocution, huh? Well, I'll wait until I have
- >>>a chance to do my assigned reading before following up on this.
-
- MZ:
- >>No need to wait: chances are that I am merely blabbering. No relation
- >>to Hallett's book, anyway. Instead of "figurative circumlocution", you
- >>may read "contextually eliminable Benthamian fiction". Same difference.
-
- J:
- >A Benthamian fiction?
- >
- >Hmm.
- >Let's see. Why Benthamian?
- >
- >Well, perhaps one Benthamian fiction is "the greatest number."
- >Bentham wrote about the greatest happiness of the greatest number,
- >right? That MUST have been a fiction. Unless he's a finitist.
-
- Bentham's theory of fictions played a cardinal role among the
- influences of modern philosophy of language, from Russell to Quine.
- See the monograph by C.K.Ogden, or Quine's "Ontological Relativity"
- for more tedious details.
-
- J:
- >>>I can't resist adding this before I do my reading:
- >>>
- >>>It appears that no sentence of the type "We cannot quantify over
- >>>everything at once" is true. And yet, it also appears that we
- >>>cannot quantify over everything at once.
- >>>How odd.
-
- MZ:
- >>To cite Church summarizing Frege, "nothing can be said truly of what
- >>does not exist."
-
- J:
- >With the apparent exception: That it does not exist.
-
- The grammatical form of Church's phrase does not support reification.
-
- MZ:
- >>(i) We cannot quantify over everything at once.
- >>
- >>will come to be analyzed as:
- >>
- >>(ii) In any language L, the range of each quantifier is limited in
- >> virtue of not containing any items of type T.
-
- J:
- >(I wasn't going to object to the quantification over languages. I
- >was going to ask what the range of the SECOND "any" is supposed to be.)
-
- This being a metalinguistic statement, the range of its quantifiers is
- fixed accordingly.
-
- MZ:
- >>process. So I claim that the propositions expressed by the sentences of
- >>*any* language, are in fact infinite abstract objects.
-
- J:
- >Explain "any".
-
- Regard it in the same manner as any reference to the universal
- totality, as relative to a background linguistic theory.
-
- MZ:
- >>Snicker if you must.
-
- J:
- >Barely containing it.
-
- I commend your forbearance.
-
- J:
- >>>I am nothing if not a dedicated amateur. Professional, too, but
- >>>amateur nonetheless.
-
- MZ:
- >>Well, no one is paying me for this, so I must be a pure amateur.
-
- J:
- >Bravo.
-
- Don't be so liberal with your praise, -- I mostly use my status as a
- license to hurl abuse at paid professionals.
-
- J:
- >>>One last bit:
- >>>I have to agree that the Kripke theory of truth does not ultimately
- >>>avoid a Tarskian hierarchy. Kripke himself says something like,
- >>>"The ghost of the Tarski hierarchy still haunts us."
-
- MZ:
- >>It makes me wonder about the point of it all.
-
- J:
- >Logic will do that.
-
- Not really; but Kripke will.
-
- J:
- >The connections between Lob's theorem and Existentialism have
- >been insufficiently explored.
-
- If you say this sort of thing long enough, it is bound to end up in
- somebody's .sig file. Is that why you don't sign with your last name?
-
- >Jamie
-
- cordially,
- mikhail zeleny@husc.harvard.edu
- "Le cul des femmes est monotone comme l'esprit des hommes."
-