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- Newsgroups: talk.origins
- Path: sparky!uunet!timbuk.cray.com!hemlock.cray.com!cherry09!robd
- From: robd@cherry09.cray.com (Robert Derrick)
- Subject: Re: Laying a trap
- Message-ID: <1992Nov23.183834.22645@hemlock.cray.com>
- Lines: 38
- Nntp-Posting-Host: cherry09
- X-Newsreader: TIN [version 1.1 PL6]
- References: <NaumuB8w165w@kalki33>
- Date: 23 Nov 92 18:38:34 CST
-
- kalki33!system@lakes.trenton.sc.us wrote:
- :
- : No, the halting problem is unsolvable. Our point was: if you give the
- : machine a time interval and it is still running at the end of the
- : interval, then rather than throw it out as non-halting, first spend a
- : little more time trying to find something in the code that may indicate
- : that it would have stopped if left alone for a little longer. That's
- : all.
-
- That's all! Astounding!
-
- The halting problem is insoluble. As you observed. (not directly, I bet)
-
- You then claim that you can try to solve the problem by hand.
-
- Using what? Magick?
-
- Because Church's Thesis says that if your program is as good as it can be,
- and it is incapable of solving the problem, and I hope that this doesn't
- come as too much of a shock to you, but your ability to carry out the
- algorithm cannot be any more powerful that that program, and therefore
- you are also incapable of solving the problem.
-
- In other words, if you can determine whether that program will halt or not,
- then there exists an algorithm that will do the same thing. You are not
- more capable than the Best Algorithm. And your Thompson relys on Church's
- Thesis for one of his main points, so I wouldn't be so quick to try to
- dispute it.
-
- Or, I suppose you could supplicate to the Supreme Being for an inspiration,
- but even if you get one, it is either deducible by some algorithm, or it
- is totally non-verifable. And although it is clear that you are gullible,
- I know that you are not completely gullible. Otherwise you would also
- have a fanatical belief in evolution, even though, as it is clear to all
- here, you know absolutely nothing about it.
- --
-
- rob derrick robd@cherry.cray.com
-