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From: "Fred. Zwarts" <F.Zwarts@HetNet.nl>
Newsgroups: comp.theory
Subject: Re: Halting Problem: What Constitutes Pathological Input
Date: Wed, 7 May 2025 12:52:41 +0200
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Op 06.mei.2025 om 21:20 schreef olcott:
> On 5/6/2025 2:10 PM, Fred. Zwarts wrote:
>> Op 06.mei.2025 om 20:47 schreef olcott:
>>> On 5/6/2025 7:14 AM, dbush wrote:
>>>> On 5/6/2025 1:54 AM, olcott wrote:
>>>>> On 5/6/2025 12:49 AM, Richard Heathfield wrote:
>>>>>> On 06/05/2025 00:29, olcott wrote:
>>>>>>
>>>>>> <snip>
>>>>>>
>>>>>>>
>>>>>>> It is the problem incorrect specification that creates
>>>>>>> the contradiction.
>>>>>>
>>>>>> Not at all. The contradiction arises from the fact that it is not 
>>>>>> possible to construct a universal decider.
>>>>>>
>>>>>>> Everyone here insists that functions computed
>>>>>>> by models of computation can ignore inputs and
>>>>>>> base their output on something else.
>>>>>>
>>>>>> I don't think anyone's saying that.
>>>>>>
>>>>>> Maybe you don't read so well.
>>>>>>
>>>>>
>>>>> What are the exact steps for DD to be emulated by HHH
>>>>> according to the semantics of the x86 language?
>>>>> *Only an execution trace will do*
>>>>
>>>> The exact same steps for DD to be emulated by UTM.
>>>>
>>>
>>> _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]
>>>
>>> Machine address by machine address specifics
>>> that you know that you cannot provide because
>>> you know that you are wrong.
>>>
>>
>> That you do not understand it, does not mean that it has not been 
>> provided to you. It has, many times. If you do not know that you are 
>> wrong, you must be very stupid.
> 
> Everything besides a machine address by machine
> address of DD emulated by HHH (according to the
> rules of the x86 language) where the emulated
> DD reaches its own "ret" instruction
> 
> *IS A DISHONEST DODGE AWAY FROM THE ACTUAL QUESTION*
That has been show hundredths of times. That you ignore it and keep 
claiming that it did not happen is dishonest.
The trace is very simple: 00002133, 00002134, 00002136, 00002137, 
0000213c, 00002141, 00002144, 00002147, 0000214b, 0000214f, 0000214f, 
00002152, 00002154, 00002155.
This would be the trace of a correct HHH. But HHH cannot do that because 
of a bug, which causes it to abort before it could see the conditional 
abort in the code of Halt7.c.