Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: olcott Newsgroups: comp.theory Subject: Re: Turing Machine computable functions apply finite string transformations to inputs VERIFIED FACT Date: Tue, 29 Apr 2025 16:44:20 -0500 Organization: A noiseless patient Spider Lines: 47 Message-ID: References: <4818688e0354f32267e3a5f3c60846ae7956bed2@i2pn2.org> <65dddfad4c862e6593392eaf27876759b1ed0e69@i2pn2.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Tue, 29 Apr 2025 23:44:20 +0200 (CEST) Injection-Info: dont-email.me; posting-host="7c9197f4fd609c81b36b8199e294c573"; logging-data="2854053"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+AKanLxrvjVC+KAEpnhbt5" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:6A5NPWiL3MLiPxidIjlCxb7TlNg= X-Antivirus-Status: Clean X-Antivirus: Norton (VPS 250429-28, 4/29/2025), Outbound message In-Reply-To: Content-Language: en-US On 4/29/2025 3:23 PM, Richard Heathfield wrote: > On 29/04/2025 20:57, olcott wrote: >> On 4/29/2025 10:33 AM, Fred. Zwarts wrote: > > > >>> makes it impossible for H to see the behaviour of P(D). >>> The behaviour of P(D) does not change, but H does not see it. >> >> H MUST REPORT ON THE BEHAVIOR THAT IT DOES SEE > > H has the whole P tape and the whole D tape at its disposal. There is > nothing it can't inspect. > int DD() { int Halt_Status = HHH(DD); if (Halt_Status) HERE: goto HERE; return Halt_Status; } When P has a pathological relationship to H, the input to H(P,D) DOES NOT HALT. > Not being able to see how P behaves in simulation is no excuse for > getting the answer wrong. THEN... I am thinking of the sum of two integers not telling you what these integers are is no excuse for you not providing their correct sum. > If because of limitations in H it fails to > spot behaviour that would have changed its report on P(D), that just > means that H is broken. > > But don't bother trying to fix it. Turing has already proved that you > can't. > You are simply not bothering to pay complete attention. -- Copyright 2025 Olcott "Talent hits a target no one else can hit; Genius hits a target no one else can see." Arthur Schopenhauer