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From: "Fred. Zwarts" <F.Zwarts@HetNet.nl>
Newsgroups: comp.theory
Subject: Re: V5 --- Professor Sipser
Date: Fri, 23 Aug 2024 10:25:42 +0200
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Op 22.aug.2024 om 15:36 schreef olcott:
> On 8/22/2024 8:21 AM, joes wrote:
>> Am Thu, 22 Aug 2024 07:59:59 -0500 schrieb olcott:
>>> On 8/22/2024 3:16 AM, Fred. Zwarts wrote:
>>>> Op 22.aug.2024 om 06:22 schreef olcott:
>>>
>>> <MIT Professor Sipser agreed to ONLY these verbatim words 10/13/2022>
>>>       If simulating halt decider H correctly simulates its input D until
>>>       H correctly determines that its simulated D would never stop
>>>       running unless aborted then
>>>       H can abort its simulation of D and correctly report that D
>>>       specifies a non-halting sequence of configurations.
>>> </MIT Professor Sipser agreed to ONLY these verbatim words 10/13/2022>
>>>
>>> We swap the word "determines" for "predicts"
>>> When we swap thew word "halt decider" for "termination analyzer" the
>>> above is translated from computer science into software engineering.
>>> The second half proves that this is the H that aborts that is making the
>>> prediction of the behavior of D when emulated by a hypothetical version
>>> of itself then never aborts.
>>
>>>>> THIS EXACTLY MATCHES THE SIPSER APPROVED CRITERIA The finite HHH(DDD)
>>>>> emulates itself emulating DDD exactly once and this is sufficient for
>>>>> this HHH to predict what a different HHH(DDD) do that never aborted
>>>>> its emulation of its input.
>>>> But that different hypothetical HHH is a non-input.
>>> HHH is supposed to predict what the behavior of DDD would be if it did
>>> not abort its emulation of DDD that is what the words that Professor
>>> agreed to mean.
>> If IT didn’t abort DDD calling its aborting self.
>>
> 
> I don't know how you twist words to get that.
> HHH is required to predict the behavior of DDD
> as if every HHH had its abort code removed.
> 
That is twisting the words. HHH is required to predict the behaviour of 
its input *without any modifications*. So, the 'as if' is a dream that 
makes the reasoning invalid. It is not allowed to substitute a dream for 
a fact.