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From: "Fred. Zwarts" <F.Zwarts@HetNet.nl>
Newsgroups: comp.theory
Subject: Re: DD correctly emulated by HHH --- Totally ignoring invalid
 rebuttals
Date: Fri, 7 Mar 2025 17:23:47 +0100
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Op 07.mrt.2025 om 16:22 schreef olcott:
> On 3/7/2025 3:09 AM, Fred. Zwarts wrote:
>> Op 06.mrt.2025 om 21:11 schreef olcott:
>>> On 3/6/2025 2:02 AM, Mikko wrote:
>>>> On 2025-03-04 14:26:39 +0000, olcott said:
>>>>
>>>>> On 3/4/2025 4:36 AM, Mikko wrote:
>>>>>> On 2025-03-04 03:07:56 +0000, olcott said:
>>>>>>
>>>>>>> int DD()
>>>>>>> {
>>>>>>>    int Halt_Status = HHH(DD);
>>>>>>>    if (Halt_Status)
>>>>>>>      HERE: goto HERE;
>>>>>>>    return Halt_Status;
>>>>>>> }
>>>>>>>
>>>>>>> _DD()
>>>>>>> [00002133] 55         push ebp      ; housekeeping
>>>>>>> [00002134] 8bec       mov ebp,esp   ; housekeeping
>>>>>>> [00002136] 51         push ecx      ; make space for local
>>>>>>> [00002137] 6833210000 push 00002133 ; push DD
>>>>>>> [0000213c] e882f4ffff call 000015c3 ; call HHH(DD)
>>>>>>> [00002141] 83c404     add esp,+04
>>>>>>> [00002144] 8945fc     mov [ebp-04],eax
>>>>>>> [00002147] 837dfc00   cmp dword [ebp-04],+00
>>>>>>> [0000214b] 7402       jz 0000214f
>>>>>>> [0000214d] ebfe       jmp 0000214d
>>>>>>> [0000214f] 8b45fc     mov eax,[ebp-04]
>>>>>>> [00002152] 8be5       mov esp,ebp
>>>>>>> [00002154] 5d         pop ebp
>>>>>>> [00002155] c3         ret
>>>>>>> Size in bytes:(0035) [00002155]
>>>>>>>
>>>>>>> DD correctly emulated by HHH cannot possibly
>>>>>>> reach its own "ret" instruction and terminate normally.
>>>>>>>
>>>>>>> The only valid rebuttal is to show all of the steps of
>>>>>>> exactly how DD correctly emulated by HHH reaches its
>>>>>>> own "ret" instruction.
>>>>>>
>>>>>> The question whether DD emulated by HHH exists is too 
>>>>>> uninteresting that
>>>>>> it would need a rebuttal, and so is the question that does it 
>>>>>> reach its
>>>>>> "ret" instruction if it exsists.
>>>>>>
>>>>>
>>>>> DD correctly emulated by HHH cannot possibly
>>>>> reach its own "ret" instruction and terminate normally.
>>>>> *Proves that the input to HHH(DD) can be rejected as non-halting*
>>>>
>>>> As "DD correctly emulated by HHH" does not exist 
>>>
>>> *No one has made any attempt to show that*
>>>
>>>
>>
>>
>> There is no proof that it does exist. 
> 
> Failing to understand this code is less than no rebuttal at all.
> https://github.com/plolcott/x86utm/blob/master/Halt7.c
> Failing to understand that no HHH can correctly simulate itself is no 
rebuttal at all.