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| From | Ben <ben.usenet@bsb.me.uk> |
|---|---|
| Newsgroups | comp.theory |
| Subject | Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) |
| Date | 2022-05-12 23:54 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <87ilqa2wgk.fsf@bsb.me.uk> (permalink) |
| References | <2pSdnR25lqHLZub_nZ2dnUU7_8zNnZ2d@giganews.com> <875ymb7gg2.fsf@bsb.me.uk> <66idnbnmOdNtyeH_nZ2dnUU7_83NnZ2d@giganews.com> <87fslf5ze1.fsf@bsb.me.uk> <dbudnSEVKLqG7OH_nZ2dnUU7_83NnZ2d@giganews.com> |
olcott <NoOne@NoWhere.com> writes:
> On 5/11/2022 8:10 PM, Ben wrote:
>> olcott <NoOne@NoWhere.com> writes:
>>
>>> On 5/11/2022 7:17 PM, Ben wrote:
>>>> olcott <NoOne@NoWhere.com> writes:
>>>>
>>>>> Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ]
>>>> There are no arguments that can be passed to H so that H can correctly
>>>> report on the halting of the function call P(P). H falls at the first
>>>> hurdle: being able to decide the halting of specific function calls.
>>>
>>> A halt decider must only correctly report on the halt status of its
>>> inputs. H(P,P)==0 and H1(P,P)==1 both do that correctly.
>>
>> The "inputs" to H are two pointers. They have no halt status.
>
> This is such a nutty thing to say when you already know that strings
> are always passed in C as char* pointers.
No pair of pointers has a halt status -- a fact I think you are aware of
since you appear to using this silly mantra to hide your key problem: H
gives the wrong answer as far as everyone but you is concerned.
In the context of H, what has a halt status is a function call. What H
should report is the whether calling the first pointer with the second
as its argument would or would not halt.
Your vague language about the "halt status of its inputs" is
deliberately designed to hide the truth: that H is not doing what it
should because H(P,P) == false even though P(P) halts.
> I am passing strings of machine code as pointers, this is the normal
> correct way to do this.
Maybe you are deliberately misusing the term string in order to draw the
argument way from the main problem: the "inputs" to H don't have a halt
status being simply data. What H should report is the whether calling
the first pointer with the second as its argument would or would not
halt. That's why H(P,P) == false is wrong. P(P) halts.
>> What
>> H(X,Y) must correctly report on is the halting or otherwise of the
>> function call X(Y). Your H does not do the job it is supposed to do.
>>
>
> int sum(int N, int M)
> {
> return (N+M);
> }
>
> It turns out that this requirement is the same as requiring that
> sum(3,4) must report on sum(5,6), thus making the requirement itself
> incorrect.
It does not "turn out" like that. Your new mantra -- that H reports in
the "halt status of its inputs" -- is just waffle to hide the plain fact
that H(P,P) == false is wrong because P(P) halts.
> The correct way of viewing the HP proof (and it is often stated this
> way) is that there exists some inputs such that H cannot correctly
> report their halt status.
That's not the correct view of the proof. That's exactly the incorrect
view that got you into trouble, and gets students into trouble everytime
this material is taught badly. Unfortunately I agree that it's a common
explanation, but that is no excuse. After 18 years you really should
know what the proof is saying.
> That incoherent requirement is based on the false assumption that the
> behavior that the input to H(P,P) specifies is the always that exact
> same behavior as P(P).
At least you accept that H can't do what the world wants it to.
Apparently you H does something no on cares about: determining the "halt
status if its inputs" which you are now crystal clear about is not the
same as the halt status of P(P).
What amazes me is how seriously you've lost track of what matters. Are
you not interested in the fact -- one you appear now to accept -- that
no function D(X,Y) can determine the halting of the function call X(Y)?
After all, as a programmer, you must know that's what you care about.
Even if your delusion is so profound that you are convinced that the
halting problems is about something else, you must see that this "other
halting problem", the one the world cares about is, unfortunately,
undecidable?
Since you are clear that no function can do what the world wants, what
else have you got to say? Can persuade anyone to care about what your H
is actually deciding? Not me.
--
Ben.
"le génie humain a des limites, quand la bêtise humaine n’en a pas"
Alexandre Dumas (fils)
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Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-11 13:07 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Mr Flibble <flibble@reddwarf.jmc> - 2022-05-11 20:11 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-11 19:23 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-11 21:02 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Mr Flibble <flibble@reddwarf.jmc> - 2022-05-12 18:31 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 12:43 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Mr Flibble <flibble@reddwarf.jmc> - 2022-05-12 18:43 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 12:45 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Mr Flibble <flibble@reddwarf.jmc> - 2022-05-12 18:47 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 12:51 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Mr Flibble <flibble@reddwarf.jmc> - 2022-05-12 19:00 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 13:06 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Mr Flibble <flibble@reddwarf.jmc> - 2022-05-12 19:13 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Ben <ben.usenet@bsb.me.uk> - 2022-05-12 21:12 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 15:18 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Ben <ben.usenet@bsb.me.uk> - 2022-05-12 23:58 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 18:28 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Ben <ben.usenet@bsb.me.uk> - 2022-05-13 01:40 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 20:32 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-12 21:48 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Ben <ben.usenet@bsb.me.uk> - 2022-05-13 13:38 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-12 20:56 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-12 19:09 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-12 18:50 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-12 18:46 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-12 18:45 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-11 19:41 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Ben <ben.usenet@bsb.me.uk> - 2022-05-12 01:17 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-11 19:29 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-11 20:52 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Ben <ben.usenet@bsb.me.uk> - 2022-05-12 02:10 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-11 21:29 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-11 23:02 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Ben <ben.usenet@bsb.me.uk> - 2022-05-12 23:54 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 18:21 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Mr Flibble <flibble@reddwarf.jmc> - 2022-05-13 00:24 +0100
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) olcott <NoOne@NoWhere.com> - 2022-05-12 18:42 -0500
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Ben <ben.usenet@bsb.me.uk> - 2022-05-13 01:35 +0100
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-12 20:25 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-12 21:41 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Ben <ben.usenet@bsb.me.uk> - 2022-05-13 12:05 +0100
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 12:01 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Ben <ben.usenet@bsb.me.uk> - 2022-05-13 20:06 +0100
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 14:24 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 16:11 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 15:22 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Dennis Bush <dbush.mobile@gmail.com> - 2022-05-13 13:26 -0700
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 15:38 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Mr Flibble <flibble@reddwarf.jmc> - 2022-05-13 21:44 +0100
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] wij <wyniijj2@gmail.com> - 2022-05-13 13:27 -0700
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 17:22 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 16:48 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 18:04 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 17:06 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 19:07 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 18:09 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 19:20 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 18:26 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 20:04 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 19:20 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 20:41 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] André G. Isaak <agisaak@gm.invalid> - 2022-05-13 19:03 -0600
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 21:21 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 22:37 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Ben <ben.usenet@bsb.me.uk> - 2022-05-13 23:46 +0100
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 17:57 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 19:09 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 18:18 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Richard Damon <Richard@Damon-Family.org> - 2022-05-13 20:09 -0400
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Ben <ben.usenet@bsb.me.uk> - 2022-05-14 01:03 +0100
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 19:11 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Ben <ben.usenet@bsb.me.uk> - 2022-05-14 01:18 +0100
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 19:22 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Ben <ben.usenet@bsb.me.uk> - 2022-05-14 01:28 +0100
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Mikko <mikko.levanto@iki.fi> - 2022-05-14 11:45 +0300
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-14 04:28 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Mikko <mikko.levanto@iki.fi> - 2022-05-14 15:55 +0300
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-14 08:53 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Mikko <mikko.levanto@iki.fi> - 2022-05-15 12:05 +0300
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Mikko <mikko.levanto@iki.fi> - 2022-05-13 16:11 +0300
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] olcott <NoOne@NoWhere.com> - 2022-05-13 11:15 -0500
Re: Proof that H(P,P)==0 is correct [ foundation of truth itself ] Mikko <mikko.levanto@iki.fi> - 2022-05-14 11:26 +0300
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Richard Damon <Richard@Damon-Family.org> - 2022-05-12 21:03 -0400
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) Mikko <mikko.levanto@iki.fi> - 2022-05-13 16:02 +0300
Re: Proof that H(P,P)==0 is correct [ refuting the halting problem proofs ](V2) wij <wyniijj2@gmail.com> - 2022-05-13 12:21 -0700
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