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- Newsgroups: comp.lang.lisp
- Path: sparky!uunet!scifi!acheron!philabs!linus!linus.mitre.org!thelonius!john
- From: john@thelonius.mitre.org (John D. Burger)
- Subject: Re: Lisp vs English (was Re: Why Isn't Lisp a Mainstream Language?)
- Message-ID: <1993Jan27.204633.9110@linus.mitre.org>
- Keywords: Lisp, English, Irrelevancy
- Sender: john@thelonius (John D. Burger)
- Nntp-Posting-Host: thelonius.mitre.org
- Organization: Artificial Intelligence Center, MITRE Corporation, Bedford, MA
- References: <19930122162651.0.SWM@SUMMER.SCRC.Symbolics.COM> <1993Jan23.073029.29713@linus.mitre.org> <1993Jan27.000253.28545@linus.mitre.org> <1993Jan27.055532.4556@linus.mitre.org>
- Date: Wed, 27 Jan 1993 20:46:33 GMT
- Lines: 54
-
- This has very little, if anything, to do with this thread, so I'll stop after
- this post. I'm surprised there weren't more replies to my original post, it
- was such a perfect flame magnet. :)
-
- Randy Crawford (crawford@boole.mitre.org) writes:
-
- The horse ran through the barn, fell.' No, English isn't entirely
- unstructured or else it'd be unintelligible. But the number of
- irregularities and contextual dependencies makes it at least context
- sensitive, and fully unrestricted as far as I'm concerned. That's pretty
- unstructured when compared to CFG programming languages
-
- I'm not sure what your garden path sentence was an example of, but it's
- certainly parseable, with or without the comma (which, by the way, I believe
- would be considered ungrammatical by proscriptive grammarians). It even has
- only one parse. As far as grammatical complexity is concerned, no one has
- proven very convincingly that English, in particular, is syntactically
- context-sensitive. Sorry. Even if English were trans-context-free, it
- needn't be unstructured, by which you mean, I presume, something like
- "having few formal requirements". And I don't know what "unrestricted"
- means. "horse barn ran through the" isn't English, so English has some
- restrictions, at least.
-
- If it isn't relatively unstructured then it's relatively structured.
- Therefore it ought to be relatively easy to specify rules for parsing it.
- Yet that's shown itself to be *highly intractable*. So I consider English
- to be comparatively unstructured.
-
- Getting right all the nooks and crannies of a natural language grammar is
- certainly hard. It hasn't yet been done. Nonetheless, systems exist that
- correctly parse better than 99 percent of, say, the New York Times, or even
- harder texts, correctly. Your may disagree, but I think that's possible
- because there's lots of structure there. Of course, a C (or even Lisp)
- compiler correctly parses much closer to 100 percent of its respective
- language. It better.
-
- If I can't parse your trivially written sentence, and few other English
- speakers can either, then it ain't English, by definition
-
- `The girl saw the boy on the hill with a telescope.' Legal English.
- Trivial. I can think of at least four ways to parse this. By your
- definition, I'm illiterate because I can't parse this.
- I prefer to think that your definition of English is flawed.
-
- I'm confused. You say "I can think of at least four ways to parse this",
- then you say "I can't parse this". Is the problem that there is more than
- one parse? That's certainly true. Nonetheless, the sentence can be parsed.
-
- As far as my definition of English is concerned, I don't know what other one
- there is. Maybe I missed the announcement of "ANSI English 93".
-
- Rather arbitrarily, I'll stop now.
-
- John Burger john@mitre.org
-