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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: olcott <polcott333@gmail.com> Newsgroups: comp.theory,sci.logic Subject: Re: A computable function that reports on the behavior of its actual self is not allowed Date: Mon, 13 May 2024 17:57:28 -0500 Organization: A noiseless patient Spider Lines: 40 Message-ID: <v1u5so$3nqc3$2@dont-email.me> References: <v1r566$2uo21$1@dont-email.me> <v1smrp$3clsp$1@dont-email.me> <v1t563$3g3o3$2@dont-email.me> <v1u201$3mvsa$2@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Tue, 14 May 2024 00:57:28 +0200 (CEST) Injection-Info: dont-email.me; posting-host="d3c8e0ce04b0d93bf756b16462dda1b4"; logging-data="3926403"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX196iaNsOOSaM68amYJDEeX4" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:Tvx4pYL152B5u7XXEuhhNXJHk7E= In-Reply-To: <v1u201$3mvsa$2@dont-email.me> Content-Language: en-US Bytes: 2837 On 5/13/2024 4:50 PM, immibis wrote: > On 13/05/24 15:39, olcott wrote: >> On 5/13/2024 4:34 AM, Fred. Zwarts wrote: >>> Op 12.mei.2024 om 21:27 schreef olcott: >>>> Computable functions are the basic objects of study in computability >>>> theory. Computable functions are the formalized analogue of the >>>> intuitive notion of algorithms, in the sense that a function is >>>> computable if there exists an algorithm that can do the job of the >>>> function, i.e. given an input of the function domain it can return the >>>> corresponding output. https://en.wikipedia.org/wiki/Computable_function >>>> >>>> A computable function that reports on the behavior of its actual >>>> self (or reports on the behavior of its caller) is not allowed. >>> >>> So, olcott uses his authority to create a new problem. Why would >>> anybody be interested in such limitation? >>> >> >> The definition of computable function is an axiomatic basis >> not any mere authority. >> > There's no axiom that says computable functions aren't allowed to have > themselves as input. If you are 100% precise with the meaning of your words you already know that no executed embedded_H can possibly report on its own behavior because no TM can take another TM as input. If you are very sloppy here you will think that an executing Turing Machine is exactly the same thing as a finite string Turing machine description. Rebuttals that are sloppy with the meaning of words allow incorrect rebuttals to seem plausible to people that are hardly paying attention. -- Copyright 2024 Olcott "Talent hits a target no one else can hit; Genius hits a target no one else can see." Arthur Schopenhauer