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Groups > comp.lang.prolog > #12860

Re: Is this correct Prolog?

From Aleksy Grabowski <hurufu@gmail.com>
Newsgroups comp.lang.prolog, comp.theory, comp.ai.philosophy
Subject Re: Is this correct Prolog?
Date 2022-05-02 15:35 +0200
Organization A noiseless patient Spider
Message-ID <t4ommc$8dt$2@dont-email.me> (permalink)
References (3 earlier) <rcadndtC6vGrOPD_nZ2dnUU7_83NnZ2d@giganews.com> <t4ljnn$5k0$1@dont-email.me> <KtadnUFsIcTQ9fP_nZ2dnUU7_8xh4p2d@giganews.com> <t4ogft$8dt$1@dont-email.me> <t4ol6v$hpr$1@dont-email.me>

Cross-posted to 3 groups.

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> The whole purpose of this thread is to find out exactly how to encode: 
> "This sentence is not true" in Prolog when we assume that True is 
> exactly the same thing as Provable in Prolog.

"This sentence is not provable" can be naĂ¯vely encoded:

g :- \+ g.

Then you can ask Prolog if this sentence is true:

?- g.

Prolog will give you the only correct answer — no answer đŸ™ƒ.

> Here is what I understand of the relationship between logic and Prolog.
> Prolog corrects all of the errors of classical and symbolic logic by 
> forming the underlying framework for the correct notion of truth and 
> provability. In all of the places where logic diverges from the Prolog 
> model logic fails to be correc
Prolog by itself is a very bad theorem prover and it is very limited 
framework for formal logic, because it implements only Horn clauses.
However it is a very good programming language and you can implement any 
theorem prover in it, like you can implement any theorem prover in C++ 
or Java.

-- 
Alex Grabowski

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Thread

Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 02:02 -0500
  Re: Is this correct Prolog? Mikko <mikko.levanto@iki.fi> - 2022-04-30 12:31 +0300
    Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-04-30 20:15 +0200
      Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 16:08 -0500
        Re: Is this correct Prolog? Mikko <mikko.levanto@iki.fi> - 2022-05-01 12:26 +0300
          Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 06:00 -0500
            Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 13:49 +0200
              Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 08:09 -0500
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 15:35 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 08:55 -0500
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 16:28 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 10:24 -0500
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 17:44 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 11:04 -0500
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 18:38 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 11:49 -0500
                Re: Is this correct Prolog? Julio Di Egidio <julio@diegidio.name> - 2022-05-02 09:51 -0700
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 19:38 +0200
                Re: Is this correct Prolog? Julio Di Egidio <julio@diegidio.name> - 2022-05-02 11:04 -0700
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 14:22 -0500
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 14:14 -0500
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 14:24 -0500
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 21:43 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 15:10 -0500
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 22:37 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 15:58 -0500
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 16:30 -0500
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 23:33 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 16:42 -0500
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-03 00:13 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 19:35 -0500
                Re: Is this correct Prolog? Jeff Barnett <jbb@notatt.com> - 2022-05-02 11:28 -0600
                Re: Is this correct Prolog? Mr Flibble <flibble@reddwarf.jmc> - 2022-05-02 19:41 +0100
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 14:26 -0500
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 14:32 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-02 18:28 -0400
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-03 00:41 +0200
                Re: Is this correct Prolog? Julio Di Egidio <julio@diegidio.name> - 2022-05-02 16:00 -0700
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-03 01:39 +0200
                Re: Is this correct Prolog? Julio Di Egidio <julio@diegidio.name> - 2022-05-02 17:26 -0700
                Re: Is this correct Prolog? Ben <ben.usenet@bsb.me.uk> - 2022-05-03 00:43 +0100
                Re: Is this correct Prolog? Julio Di Egidio <julio@diegidio.name> - 2022-05-02 17:20 -0700
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 19:57 -0500
                Re: Is this correct Prolog? Ben <ben.usenet@bsb.me.uk> - 2022-05-03 03:21 +0100
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 22:01 -0500
                Re: Is this correct Prolog? Julio Di Egidio <julio@diegidio.name> - 2022-05-03 01:18 -0700
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-03 08:05 -0400
                Re: Is this correct Prolog? [ Tarski ] olcott <polcott2@gmail.com> - 2022-05-04 21:30 -0500
                Re: Is this correct Prolog? [ Tarski ] Richard Damon <Richard@Damon-Family.org> - 2022-05-04 22:46 -0400
                Re: Is this correct Prolog? [ Tarski ] olcott <polcott2@gmail.com> - 2022-05-04 22:02 -0500
                Re: Is this correct Prolog? [ Tarski ] Richard Damon <Richard@Damon-Family.org> - 2022-05-05 07:41 -0400
                Re: Is this correct Prolog? [ Tarski ] olcott <polcott2@gmail.com> - 2022-05-05 12:57 -0500
                Re: Is this correct Prolog? [ Tarski ] André G. Isaak <agisaak@gm.invalid> - 2022-05-05 12:06 -0600
                Re: Is this correct Prolog? [ Tarski ] olcott <polcott2@gmail.com> - 2022-05-05 16:23 -0500
                Re: Is this correct Prolog? [ Tarski ] Richard Damon <Richard@Damon-Family.org> - 2022-05-05 22:24 -0400
                Re: Is this correct Prolog? [ Tarski ] olcott <polcott2@gmail.com> - 2022-05-05 21:37 -0500
                Re: Is this correct Prolog? [ Tarski ] Richard Damon <Richard@Damon-Family.org> - 2022-05-06 07:43 -0400
                Re: Is this correct Prolog? [ Tarski ] olcott <polcott2@gmail.com> - 2022-05-06 15:29 -0500
                Re: Is this correct Prolog? Ben <ben.usenet@bsb.me.uk> - 2022-05-03 15:59 +0100
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-03 09:18 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 11:08 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-03 10:52 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 12:05 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-03 11:17 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 12:33 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-03 12:23 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 13:59 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-03 14:03 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 22:24 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-03 21:54 -0600
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-04 07:27 -0400
                Re: Is this correct Prolog? [ André didn't lie after all ] olcott <polcott2@gmail.com> - 2022-05-03 12:08 -0500
                Re: Is this correct Prolog? Jeff Barnett <jbb@notatt.com> - 2022-05-03 12:33 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 14:12 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-03 13:22 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 21:53 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-03 23:12 -0400
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 22:53 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-03 22:06 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-04 01:17 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-04 08:02 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-04 14:01 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-04 19:48 -0400
                Re: Is this correct Prolog? Jeff Barnett <jbb@notatt.com> - 2022-05-03 15:58 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-03 17:13 -0500
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 19:11 -0500
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 19:35 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-02 20:47 -0400
                Re: Is this correct Prolog? Julio Di Egidio <julio@diegidio.name> - 2022-05-02 07:59 -0700
                Re: Is this correct Prolog? Aleksy Grabowski <hurufu@gmail.com> - 2022-05-02 17:15 +0200
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 10:45 -0500
                Re: Is this correct Prolog? Julio Di Egidio <julio@diegidio.name> - 2022-05-02 09:02 -0700
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 11:26 -0500
      Re: Is this correct Prolog? Mikko <mikko.levanto@iki.fi> - 2022-05-01 12:24 +0300
        Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 05:58 -0500
          Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 07:12 -0400
            Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 06:45 -0500
              Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 08:07 -0400
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 07:15 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 13:49 -0400
    Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 15:48 -0500
      Re: Is this correct Prolog? Mikko <mikko.levanto@iki.fi> - 2022-05-01 12:38 +0300
        Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 06:06 -0500
          Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 07:26 -0400
            Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 06:54 -0500
              Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 08:11 -0400
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 07:19 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 14:00 -0400
  Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-04-30 21:08 -0400
    Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 20:42 -0500
      Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-04-30 22:00 -0400
        Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 21:21 -0500
          Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-04-30 22:38 -0400
            Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 21:56 -0500
              Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-04-30 23:11 -0400
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 22:15 -0500
                Re: Is this correct Prolog? Jeff Barnett <jbb@notatt.com> - 2022-04-30 23:24 -0600
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 06:35 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 13:16 -0400
                Re: Is this correct Prolog? Mr Flibble <flibble@reddwarf.jmc> - 2022-05-01 13:19 +0100
                Re: Is this correct Prolog? polcott <polcott2@gmail.com> - 2022-05-01 07:51 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 13:19 -0400
                Re: Is this correct Prolog? Jeff Barnett <jbb@notatt.com> - 2022-05-01 11:22 -0600
                Re: Is this correct Prolog? Mikko <mikko.levanto@iki.fi> - 2022-05-01 12:45 +0300
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 06:28 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 08:01 -0400
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 07:09 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 08:16 -0400
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 07:18 -0400
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 06:50 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 13:26 -0400
    Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 20:47 -0500
      Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-04-30 23:49 -0500
        Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 11:08 -0500
          Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 13:28 -0500
            Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 14:00 -0500
              Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 15:19 -0400
              Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 14:32 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-01 13:44 -0600
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 14:48 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 16:01 -0400
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 15:42 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-01 14:51 -0600
                Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 17:04 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 18:08 -0400
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-01 17:39 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 19:18 -0400
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-01 17:26 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-01 19:58 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 21:32 -0400
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-01 20:53 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 22:14 -0400
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-01 21:18 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-01 20:37 -0600
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 22:47 -0400
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-01 22:04 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-01 22:10 -0600
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-02 07:10 -0400
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-02 08:19 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-02 18:38 -0400
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-01 16:37 -0600
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-01 17:44 -0500
                Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-01 17:15 -0600
                Re: Is this correct Prolog? [ André is proven to be a liar ] olcott <NoOne@NoWhere.com> - 2022-05-01 18:33 -0500
                Re: Is this correct Prolog? [ André is proven to be a liar ] André G. Isaak <agisaak@gm.invalid> - 2022-05-01 17:44 -0600
                Re: Is this correct Prolog? [ André is proven to be a liar ] olcott <NoOne@NoWhere.com> - 2022-05-01 18:53 -0500
                Re: Is this correct Prolog? [ André is proven to be a liar ] olcott <polcott2@gmail.com> - 2022-05-01 18:15 -0500
                Re: Is this correct Prolog? [ André is proven to be a liar ] Richard Damon <Richard@Damon-Family.org> - 2022-05-01 19:21 -0400
                Re: Is this correct Prolog? [ André is proven to be a liar ] olcott <polcott2@gmail.com> - 2022-05-01 19:56 -0500
                Re: Is this correct Prolog? olcott <polcott2@gmail.com> - 2022-05-01 17:05 -0500
                Re: Is this correct Prolog? Richard Damon <Richard@Damon-Family.org> - 2022-05-01 16:55 -0400
        Re: Is this correct Prolog? olcott <NoOne@NoWhere.com> - 2022-05-01 11:57 -0500
          Re: Is this correct Prolog? André G. Isaak <agisaak@gm.invalid> - 2022-05-01 11:21 -0600

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