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Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Mikko <mikko.levanto@iki.fi> Newsgroups: comp.theory Subject: Re: Overcoming the proof of undecidability of the Halting Problem by a simple example in C Date: Fri, 16 May 2025 10:15:52 +0300 Organization: - Lines: 36 Message-ID: <1006on8$3l9t7$1@dont-email.me> References: <1005jsk$3akrk$1@dont-email.me> <bc6f0f045212bdfb7f7d883426873a09e37789ea@i2pn2.org> <1005u6v$3cpt2$1@dont-email.me> <1005v0p$3b07v$1@dont-email.me> <10063u0$3dmiv$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Fri, 16 May 2025 09:15:52 +0200 (CEST) Injection-Info: dont-email.me; posting-host="1dfa167546830b8917680f44790d20f0"; logging-data="3844007"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+99QeWiJNU1uE3EFgvSR0C" User-Agent: Unison/2.2 Cancel-Lock: sha1:dq7HKzRDqz+LCJD6QD7j26jAUxY= On 2025-05-16 01:21:04 +0000, olcott said: > On 5/15/2025 6:57 PM, Richard Heathfield wrote: >> On 16/05/2025 00:43, olcott wrote: >>> On 5/15/2025 6:18 PM, Richard Damon wrote: >>>> On 5/15/25 4:47 PM, olcott wrote: >>>>> I overcome the proof of undecidability of the Halting >>>>> Problem in that the code that >>>>> "does the opposite of whatever value that HHH returns" >>>>> becomes unreachable to DD correctly simulated by HHH. >>>> >>>> Nope, only to youtr INCORRECTLY simuated by HHH. >>>> >>> >>> In other words you believe that professor Sipser >>> screwed up when he agreed with these exact words. >> >> Or maybe he just knows what 'if' means. >> > > <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 > > It is a verified fact that HHH does simulate DD according > to the rules of the x86 language, thus correctly > > until HHH correctly determines that its simulated DD > would never stop running unless aborted Otherwise true but the "correctly" is not verified. -- Mikko