Path: ...!2.eu.feeder.erje.net!feeder.erje.net!weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: immibis Newsgroups: comp.theory,sci.logic Subject: Re: Halt deciders accurately predict future behavior based on past behavior Date: Sat, 16 Mar 2024 20:56:17 +0100 Organization: A noiseless patient Spider Lines: 15 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sat, 16 Mar 2024 19:56:18 -0000 (UTC) Injection-Info: dont-email.me; posting-host="9416729331008e05b2a2bbdf5315a61a"; logging-data="3222848"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1//IJG1plTBHUG9PW/oWKuB" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:d5zzmw0rt6TUNp0/lRLih4tGa8U= Content-Language: en-US In-Reply-To: Bytes: 2401 On 16/03/24 19:19, olcott wrote: > On 3/16/2024 12:30 PM, immibis wrote: >> On 16/03/24 16:28, olcott wrote: >>> The original halt status criteria has the impossible requirement >>> that H(D,D) must report on behavior that it does not actually see. >>> Requiring H to be clairvoyant is an unreasonable requirement. >> >> The purpose of a halting decider is to be clairvoyant. A halting >> decider must decide that a program will never halt even if we run it >> forever, without actually running it forever. >> > Not at all. Something like mathematical induction accurately > extrapolates what the future behavior would be: In other words: mathematical induction is clairvoyant.