home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.philosophy.tech:4662 sci.logic:2515
- Path: sparky!uunet!gatech!rutgers!hsdndev!husc-news.harvard.edu!husc10.harvard.edu!zeleny
- From: zeleny@husc10.harvard.edu (Michael Zeleny)
- Newsgroups: sci.philosophy.tech,sci.logic
- Subject: Re: Semantics of Set Theory
- Message-ID: <1992Dec31.112231.18915@husc3.harvard.edu>
- Date: 31 Dec 92 16:22:29 GMT
- References: <1992Dec22.195444.2427@guinness.idbsu.edu> <1992Dec25.052154.18835@husc3.harvard.edu> <1992Dec28.190416.1204@guinness.idbsu.edu>
- Organization: The Phallogocentric Cabal
- Lines: 81
- Nntp-Posting-Host: husc10.harvard.edu
-
- In article <1992Dec28.190416.1204@guinness.idbsu.edu>
- holmes@opal.idbsu.edu (Randall Holmes) writes:
-
- >I've sent a longer reply directly to Zeleny; anyone who would like to
- >see it may request it from me (at holmes@math.idbsu.edu ; you may have
- >trouble if you just hit the r key).
-
- I am working on a point-by-point reply, which should be ready in a
- couple of days, and will likewise make it available on request.
-
- >I do not agree with Zeleny that quantification involves ontological
- >commitment to the domain over which one is quantifying as a completed
- >totality. It merely involves commitment to each of the objects in the
- >domain. I'll admit that I am committed to an ontology including all
- >of the quantification ranges, since there is only one, the universe,
- >which is in fact an object! But this involves taking unfair advantage
- >of my NF advocacy; even from a ZFC standpoint, it can be observed that
- >quantification ranges are not necessarily objects; they can be
- >non-reified predicates, and they can be "referred to" using
- >syntactical means.
-
- I reiterate that an adequate semantical theory has no choice but to
- recognize the reified ranges of quantification of its object language
- as _bona fide_ objects. It is not taking unfair advantage of
- Randall's NF advocacy to indicate that a Quinean (cf. "On What There
- Is") or, for that matter, Churchian (cf. "Ontological Commitment")
- semanticist, who recognizes the maxim stipulating that each theory
- carries an ontological commitment to its ranges of quantification, is
- _ipso facto_ obligated, when scrutinizing his semantical theory,
- including this very maxim, to extend his ontological commitment to
- *its* ranges of quantification, comprised of theories and their
- ranges. This point is so simple and incontrovertible, that no further
- elaboration ought to be necessary, and I can't help wondering why
- Randall is unwilling to accept it.
-
- >Proper classes are a practically very useful means to partially evade
- >the impossibility of reifying all predicates. Only as long as they
- >are eliminable in principle in favor of discussion of syntactical
- >objects are they actually fulfilling this function; as soon as one
- >quntifies over them or admits super-classes, one has surreptitiously
- >made the universe of objects larger and kicked the problems upstairs.
- >But they do not go away. It is not possible to reify all predicates;
- >the only way to talk about predicates in full generality is
- >syntactical, ugly as it is. Predicates do not _in general_ function
- >as names of objects; that's the point of the paradoxes.
-
- Clearly, each of us sees a different point in the paradoxes. I
- maintain that all *well-formed* and *meaningful* predicates function
- as names of objects (propositional forms). Furthermore, I wonder
- whether Randall recognizes any merit in NBG, which allows proper
- classes within its ontology.
-
- >Reference in one's own language is inscrutable to oneself; I think
- >that the success or failure of the reference of our terms depends
- >ultimately on factors external to us, and I see no reason to believe
- >that we should have unrestricted access to our own semantics.
-
- I do not understand this appeal to inscrutability; surely it is not
- justified by anything claimed by Quine ("Ontological Relativity"), --
- each Quinean native is perfectly capable of articulating the
- disquotational scheme
- "Gavagai" refers to gavagai.
- If Quine argues that inscrutability of reference is not limited to the
- cases of radical translation between different languages, and that "we
- can reproduce the inscrutability of reference at home", he does so in
- the context of analyzing the case of "homophonic translation" of his
- neighbor's idiolect. Surely this is a far cry from blithely claiming
- that "reference in one's own language is inscrutable to oneself", --
- one is generally not required to homophonically translate his own
- idiolect. Randall, I entreat you to abstain from non-standard
- philosophical use of technical terms.
-
- >--
- >The opinions expressed | --Sincerely,
- >above are not the "official" | M. Randall Holmes
- >opinions of any person | Math. Dept., Boise State Univ.
- >or institution. | holmes@opal.idbsu.edu
-
- cordially,
- mikhail zeleny@husc.harvard.edu
- "Le cul des femmes est monotone comme l'esprit des hommes."
-