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- Xref: sparky comp.ai.philosophy:7426 sci.philosophy.tech:4999 sci.logic:2648
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- From: zeleny@husc10.harvard.edu (Mikhail Zeleny)
- Newsgroups: comp.ai.philosophy,sci.philosophy.tech,sci.logic
- Subject: Re: Searle on syntax mirroring semantics
- Message-ID: <1993Jan26.203945.19833@husc3.harvard.edu>
- Date: 27 Jan 93 01:39:44 GMT
- Article-I.D.: husc3.1993Jan26.203945.19833
- References: <1993Jan26.121155.24448@sophia.smith.edu> <auerbach.728056438@news.ncsu.edu>
- Organization: The Phallogocentric Cabal
- Lines: 57
- Nntp-Posting-Host: husc10.harvard.edu
-
- In article <auerbach.728056438@news.ncsu.edu>
- auerbach@ncsu.edu (David D Auerbach) writes:
-
- >orourke@sophia.smith.edu (Joseph O'Rourke) writes:
-
- JO'R:
- >>Can anyone explain this sentence to me? It is on p.203 of "The
- >>Rediscovery of the Mind" by John Searle.
- >
- >> The development of proof theory showed that within certain
- >> well-known limits the semantic relations between propositions
- >> can be entirely mirrored by the syntactic relations between
- >> the sentences that express those propositions.
-
- DDA:
- >Well, without the context it just seems like an unnecessarily vague way of
- >pointing at the completeness theorem for first-order logic; roughly, that
- >the semantic relation of first-order consequence (taken as adequately
- >captured by a Frege-Tarski formal semantics) is co-extensive with <name
- >your favorite first-order logic derviation system>.
-
- I have to agree with this interpretation, although I have no idea why
- it is attributed to the development of proof theory, rather than model
- theory.
-
- DDA:
- >More vague is the "well-known" limits. He could mean a) that first-order
- >logical theoremhood is "only" r.e. and not recursive or b) that full
- >second-order logic is not so nice proof theoretically or c) if all of
- >arithmetic is somehow "semantic" then (cashing in syntactic as
- >axiomatizable) the truths of arithmetic outstrip any correct axiomatization.
- >These are mere sketches, and c) is the least plausible reading of Searle's
- >remark.
-
- Looking at the passage in question, I find that Searle is setting up a
- dialectical opponent espousing the pro-"Strong AI" position, so as to
- allow himself an easy thrill of kicking a dead horse. In this context,
- the "well-known" limits may also be dictated by the formal pragmatic
- component contributed by deixis, as analyzed by Bar-Hillel and Montague.
- However, a combination of (a) and (b) seems most plausible here.
-
- DDA:
- >A more general way of looking at it is that the notion of logical form is
- >unexpectedly successful in tracking semantic relations; this restores all
- >of Searle's vagueness (in the out of context quote, he said carefully) but
- >sounds nicer.
-
- Given that the reference to expectations is purely gratuitous, the
- dead pathfinding metaphor is pleasantly inappropriate, and, most
- importantly, the notion of logical form is at least as plausibly
- relegated to the purview of semantics, as to that of syntax, I find
- this formulation to be, commendably, even more obscure than the
- original.
-
- cordially,
- mikhail zeleny@husc.harvard.edu
- "Le cul des femmes est monotone comme l'esprit des hommes."
-