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- Newsgroups: comp.object
- Path: sparky!uunet!mcsun!Germany.EU.net!donald!hasko
- From: hasko@heeg.de (Hasko Heinecke)
- Subject: Re: Object hidden state and side effects
- Message-ID: <1992Dec17.155809.26541@heeg.de>
- Organization: Georg Heeg Objektorientierte Systeme, Dortmund, FRG
- References: <1992Dec15.143243.16256@heeg.de> <1992Dec15.224536.13554@crd.ge.com> <BzC05w.2xA@newsflash.concordia.ca>
- Date: Thu, 17 Dec 1992 15:58:09 GMT
- Lines: 43
-
- In article <BzC05w.2xA@newsflash.concordia.ca> grogono@cs.concordia.ca (Peter Grogono) writes:
- >In article <1992Dec15.224536.13554@crd.ge.com> eaker@ukulele.crd.ge.com (Chuck Eaker) writes:
- >>In article <1992Dec15.143243.16256@heeg.de>, hasko@heeg.de (Hasko Heinecke) writes:
- >>|> In article <1992Dec14.175402.1889@crd.ge.com> eaker@ukulele.crd.ge.com (Chuck Eaker) writes:
- >>|> >The point is that computers cannot use "the *real* 3/4."
- >>|>
- >>|> You wanted philosophy, so here it is: What *is* the real 3/4. What would
- >>|> Immanuel Kant say?
- >>
- >>I'm sure Kant and other philosophers would agree that 3/4 is a rational
- >>number, and that whatever the nature of its existence, there is only
- >>one such number, it cannot be created, destroyed, copied, or changed
- >>in any way. Unlike philosophers, we don't have to worry about "realms"
- >> ............
- >
- >I suggest we all go and re-read \cite{Whitehead:1910} and then resume
- >the conversation.
- >
- >@book{Whitehead:1910
- > author = "A.N. Whitehead and B. Russell",
- > title = "Principia Mathematica",
- > publisher = "Cambridge University Press",
- > date = "1910--13"}
-
- And after that Goedel's famous article where he stated that all non-trivial
- mathematical systems are inconsistent, i.e. there exist true statements that
- cannot be proven, and that there are false statements whose negation cannot
- be proven. I can look up the data for this article, or just read Goedel,
- Escher, Bach by D. Hofstaedter.
-
- After this, read Turing's stuff, who prove that you can't even find out which
- statements are undecidable.
-
- Summary: Don't rely to much in number theory, it breaks down just like
- marriages... :-)
-
- Hasko Heinecke
-
- --
- +-------------------------------------------------------+
- | Hasko Heinecke @ Georg Heeg Objektorientierte Systeme |
- | I _never_ mean what I say - and nobody else does... |
- +-------------------------------------------------------+
-