Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: olcott Newsgroups: comp.theory Subject: Re: DDD correctly emulated by HHH cannot possibly halt Date: Fri, 12 Jul 2024 09:51:05 -0500 Organization: A noiseless patient Spider Lines: 47 Message-ID: References: <04b97cd4a405abead92368522fcf77070bb4fa55@i2pn2.org> <6d43f24547a3b170ce6f7a99e30ec60dec589f79@i2pn2.org> <7f9b731b2367a2bcf2883278ee5265d30a8f82d6@i2pn2.org> <744d42e4d9d67b49cb1844a2651cb0c350760f0c@i2pn2.org> <56314b3bac257d0fc228c26f3c8c5eec40a87215@i2pn2.org> <1fbe0efc5b030be11df07a930754d90ce56525be@i2pn2.org> <4ed43f5b0a3bfc3833e62746b70cd3c3dafac1e9@i2pn2.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Fri, 12 Jul 2024 16:51:08 +0200 (CEST) Injection-Info: dont-email.me; posting-host="a53340e46817c86b736359d5ee28d54a"; logging-data="3235896"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19dL/ge8dPfDqTGt9RdawDn" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:mPNwuKzyxQ02UNNpTCjSKSdY43g= Content-Language: en-US In-Reply-To: Bytes: 3773 On 7/12/2024 8:02 AM, Fred. Zwarts wrote: > Op 12.jul.2024 om 14:08 schreef olcott: >> >> when 1 to ∞ steps of DDD are correctly emulated in >> the infinite set of every HHH/DDD pair and no DDD >> halts then we can say that DDD DOES NOT HALT. > > If 1 to ∞ steps are simulated by HHH and none of these simulations is > correct, then none of the simulations is correct. *Vacuous "truth" is a form of deception* We stipulate that the only measure of a correct emulation is the semantics of the x86 programming language. _DDD() [00002163] 55 push ebp ; housekeeping [00002164] 8bec mov ebp,esp ; housekeeping [00002166] 6863210000 push 00002163 ; push DDD [0000216b] e853f4ffff call 000015c3 ; call HHH(DDD) [00002170] 83c404 add esp,+04 [00002173] 5d pop ebp [00002174] c3 ret Size in bytes:(0018) [00002174] When N steps of DDD are emulated by HHH according to the semantics of the x86 language then N steps are emulated correctly. When we examine the infinite set of every HHH/DDD pair such that: HHH₁ one step of DDD is correctly emulated by HHH. HHH₂ two steps of DDD are correctly emulated by HHH. HHH₃ three steps of DDD are correctly emulated by HHH. .... HHH∞ The emulation of DDD by HHH never stops running. The above specifies the infinite set of every HHH/DDD pair where 1 to infinity steps of DDD are correctly emulated by HHH. No DDD instance of each HHH/DDD pair ever reaches past its own machine address of 0000216b and halts. Thus each HHH element of the above infinite set of HHH/DDD pairs is necessarily correct to reject its DDD as non-halting. -- Copyright 2024 Olcott "Talent hits a target no one else can hit; Genius hits a target no one else can see." Arthur Schopenhauer