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From: dbush <dbush.mobile@gmail.com>
Newsgroups: comp.theory
Subject: Re: Every sufficiently competent C programmer knows --- Very Stupid
 Mistake and Liars
Date: Tue, 11 Mar 2025 22:48:42 -0400
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On 3/11/2025 10:46 PM, olcott wrote:
> On 3/11/2025 9:41 PM, dbush wrote:
>> On 3/11/2025 10:39 PM, olcott wrote:
>>> On 3/11/2025 9:37 PM, dbush wrote:
>>>> On 3/11/2025 10:36 PM, olcott wrote:
>>>>> On 3/11/2025 9:32 PM, dbush wrote:
>>>>>> On 3/11/2025 10:31 PM, olcott wrote:
>>>>>>> On 3/11/2025 9:18 PM, dbush wrote:
>>>>>>>> On 3/11/2025 10:06 PM, olcott wrote:
>>>>>>>>> On 3/11/2025 9:02 PM, dbush wrote:
>>>>>>>>>> On 3/11/2025 9:41 PM, Richard Heathfield wrote:
>>>>>>>>>>> On 12/03/2025 01:22, olcott wrote:
>>>>>>>>>>>> DDD correctly simulated by HHH never reaches its
>>>>>>>>>>>> own "return" instruction and terminates normally
>>>>>>>>>>>> in any finite or infinite number of correctly
>>>>>>>>>>>> simulated steps.
>>>>>>>>>>>
>>>>>>>>>>> If it correctly simulates infinitely many steps, it doesn't 
>>>>>>>>>>> terminate. Look up "infinite".
>>>>>>>>>>>
>>>>>>>>>>> But your task is to decide for /any/ program, not just DDD. 
>>>>>>>>>>> That, as you are so fond of saying, is 'stipulated', and you 
>>>>>>>>>>> can't get out of it. The whole point of the 
>>>>>>>>>>> Entscheidungsproblem is its universality. Ignore that, and 
>>>>>>>>>>> you have nothing.
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Given that his code has HHH(DD) returning 0, 
>>>>>>>>>
>>>>>>>>> THESE ARE THE WORDS ANYONE THAT DODGES THESE
>>>>>>>>> WORDS WILL BE TAKEN FOR A LIAR
>>>>>>>>>
>>>>>>>>> void DDD()
>>>>>>>>> {
>>>>>>>>>    HHH(DDD);
>>>>>>>>>    return;
>>>>>>>>> }
>>>>>>>>>
>>>>>>>>> DDD correctly simulated by HHH never reaches its
>>>>>>>>> own "return" instruction and terminates normally
>>>>>>>>> in any finite or infinite number of correctly
>>>>>>>>> simulated steps.
>>>>>>>>>
>>>>>>>>
>>>>>>>> Changing the input is not allowed.
>>>>>>>
>>>>>>> *You are simply lying that any input was ever changed*
>>>>>>>
>>>>>>
>>>>>> You did precisely that when you hypothesize different code for HHH.
>>>>>>
>>>>>> Changing the input is not allowed.
>>>>>
>>>>> *THIS IS WHAT MY ORIGINAL WORDS MEANT*
>>>>> HHH is the infinite set of every possible C function
>>>>> that correctly emulates N steps of its input where
>>>>> N any finite positive integer.
>>>>>
>>>>
>>>> In other words, you're changing the input.
>>>>
>>>> Changing the input is not allowed.
>>>
>>> It is an infinite set of HHH/DDD pairs having the
>>> property that DDD[0] ... DDD[N] never halts.
>>>
>>
>> In other words, you're not answering the question that a solution to 
>> the halting problem is required to answer:
>>
>> (<X>,Y) maps to 1 if and only if X(Y) halts when executed directly
>> (<X>,Y) maps to 0 if and only if X(Y) does not halt when executed 
>> directly
>>
> 
> Yes I am yet you refuse to pay anywhere near close
> enough attention to see how I already fully addressed this.
> If you pay 100% perfect attention you might get it.
> 

Telling us there's a black cat in your kitchen is always the wrong 
answer when we ask if there's a white dog in your living room.