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From: Alan Mackenzie <acm@muc.de>
Newsgroups: comp.theory
Subject: Re: DDD correctly emulated by HHH is correctly rejected as non-halting.
Date: Wed, 10 Jul 2024 18:55:47 -0000 (UTC)
Organization: muc.de e.V.
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Fred. Zwarts <F.Zwarts@hetnet.nl> wrote:
> Op 10.jul.2024 om 20:12 schreef Alan Mackenzie:
>> [ Followup-To: set ]

>> In comp.theory Fred. Zwarts <F.Zwarts@hetnet.nl> wrote:

>> [ .... ]

>>> Proving that the simulation is incorrect. Because a correct simulation
>>> would not abort a halting program halfway its simulation.

>> Just for clarity, a correct simulation wouldn't abort a non-halting
>> program either, would it?  Or have I misunderstood this correctness?

>> [ .... ]


> A non-halting program cannot be simulated correctly in a finite time. 
> So, it depends whether we can call it a correct simulation, when it does 
> not abort. But, for some meaning of 'correct', indeed, a simulator 
> should not abort a non-halting program either.

OK, thanks!

-- 
Alan Mackenzie (Nuremberg, Germany).