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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: dbush <dbush.mobile@gmail.com> Newsgroups: comp.theory Subject: Re: DDD specifies recursive emulation to HHH and halting to HHH1 Date: Mon, 31 Mar 2025 21:39:06 -0400 Organization: A noiseless patient Spider Lines: 188 Message-ID: <vsfg3q$1l8n5$3@dont-email.me> References: <vrfuob$256og$1@dont-email.me> <vs9h9o$23cav$2@dont-email.me> <vs9hh3$20g2j$6@dont-email.me> <vs9jie$23cav$4@dont-email.me> <vs9kb1$26cg5$2@dont-email.me> <vs9pni$27rl4$9@dont-email.me> <vs9r1b$28tqg$2@dont-email.me> <vs9t45$2f6n5$1@dont-email.me> <9f2ff3ab9b99a7bb6dfa0885f9757f810ce52e66@i2pn2.org> <vsaam4$2sfhq$1@dont-email.me> <vsbi7e$1hblk$1@dont-email.me> <vsc6qi$27lbo$2@dont-email.me> <8a3e7e93e6cad20b29d23405a0e6dbd497a492ac@i2pn2.org> <vscegq$2fv3s$2@dont-email.me> <26f33bb039fda7d28ae164cfc4d0f582d4698f31@i2pn2.org> <vsclsb$2n4jc$1@dont-email.me> <36a4c76730b23cf78ddde73c723116b5380973a1@i2pn2.org> <vsctnm$2ub5m$2@dont-email.me> <72d003704b5bacf77110750e8c973d62869ad204@i2pn2.org> <vsf402$1crun$4@dont-email.me> <vsf49v$1adee$1@dont-email.me> <vsf520$1crun$5@dont-email.me> <vsf6fp$1adee$2@dont-email.me> <vsf8pp$1i673$1@dont-email.me> <vsfbp9$1l8n5$1@dont-email.me> <vsfdji$1m8qr$1@dont-email.me> <vsfe0c$1l8n5$2@dont-email.me> <vsffcj$1m8qr$5@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Tue, 01 Apr 2025 03:39:06 +0200 (CEST) Injection-Info: dont-email.me; posting-host="43a1f663b1fe04e5f0ee05272f138407"; logging-data="1745637"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18yLJxqoPugz+Ls+cbBYLNB" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:D5pD5Y/PORzEo+JkyWN1JqVwJ48= In-Reply-To: <vsffcj$1m8qr$5@dont-email.me> Content-Language: en-US Bytes: 10002 On 3/31/2025 9:26 PM, olcott wrote: > On 3/31/2025 8:03 PM, dbush wrote: >> On 3/31/2025 8:56 PM, olcott wrote: >>> On 3/31/2025 7:25 PM, dbush wrote: >>>> On 3/31/2025 7:34 PM, olcott wrote: >>>>> On 3/31/2025 5:54 PM, dbush wrote: >>>>>> On 3/31/2025 6:30 PM, olcott wrote: >>>>>>> On 3/31/2025 5:17 PM, dbush wrote: >>>>>>>> On 3/31/2025 6:12 PM, olcott wrote: >>>>>>>>> On 3/31/2025 3:44 PM, joes wrote: >>>>>>>>>> Am Sun, 30 Mar 2025 21:13:09 -0500 schrieb olcott: >>>>>>>>>>> On 3/30/2025 7:32 PM, Richard Damon wrote: >>>>>>>>>>>> On 3/30/25 7:59 PM, olcott wrote: >>>>>>>>>>>>> On 3/30/2025 5:50 PM, Richard Damon wrote: >>>>>>>>>>>>>> On 3/30/25 5:53 PM, olcott wrote: >>>>>>>>>>>>>>> On 3/30/2025 4:01 PM, Richard Damon wrote: >>>>>>>>>>>>>>>> On 3/30/25 3:42 PM, olcott wrote: >>>>>>>>>>>>>>>>> On 3/30/2025 8:50 AM, Fred. Zwarts wrote: >>>>>>>>>>>>>>>>>> Op 30.mrt.2025 om 04:35 schreef olcott: >>>>>>>>>>>>>>>>>>> On 3/29/2025 8:12 PM, Richard Damon wrote: >>>>>>>>>>>>>>>>>>>> On 3/29/25 6:44 PM, olcott wrote: >>>>>>>>>>>>>>>>>>>>> On 3/29/2025 5:08 PM, dbush wrote: >>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 5:46 PM, olcott wrote: >>>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 3:14 PM, dbush wrote: >>>>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 4:01 PM, olcott wrote: >>>>>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 2:26 PM, dbush wrote: >>>>>>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 3:22 PM, olcott wrote: >>>>>>>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 2:06 PM, dbush wrote: >>>>>>>>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 3:03 PM, olcott wrote: >>>>>>>>>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 10:23 AM, dbush wrote: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>> On 3/29/2025 11:12 AM, olcott wrote: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> On 3/28/2025 11:00 PM, dbush wrote: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> On 3/28/2025 11:45 PM, olcott wrote: >>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> An input that halts when executed directly is not >>>>>>>>>>>>>>>>>>>>>> non- >>>>>>>>>>>>>>>>>>>>>> terminating >>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> When UTM1 is a UTM that has been adapted to only >>>>>>>>>>>>>>>>>>>>>>> simulate a >>>>>>>>>>>>>>>>>>>>>>> finite number of steps >>>>>>>>>>>>>>>>>>>>>> And is therefore no longer a UTM that does a >>>>>>>>>>>>>>>>>>>>>> correct and >>>>>>>>>>>>>>>>>>>>>> complete simulation >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> and input D calls UTM1 then the behavior of D >>>>>>>>>>>>>>>>>>>>>>> simulated by >>>>>>>>>>>>>>>>>>>>>>> UTM1 >>>>>>>>>>>>>>>>>>>>>> Is not what I asked about. I asked about the >>>>>>>>>>>>>>>>>>>>>> behavior of D >>>>>>>>>>>>>>>>>>>>>> when executed directly. >>>>>>>>>>>>>>>>>>>>> Off topic for this thread. >>>>>>>>>> Yes, HHH is off the topic of deciding halting. >>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> UTM1 D DOES NOT HALT UTM2 D HALTS D is the same >>>>>>>>>>>>>>>>>>>>> finite string >>>>>>>>>>>>>>>>>>>>> in both cases. >>>>>>>>>>>>>>>>>>>> No it isn't, not if it is the definition of a PROGRAM. >>>>>>>>>> >>>>>>>>>>>>>>>>>>> The behavior that these machine code bytes specify: >>>>>>>>>>>>>>>>>>> 558bec6872210000e853f4ffff83c4045dc3 as an input to >>>>>>>>>>>>>>>>>>> HHH is >>>>>>>>>>>>>>>>>>> different than these same bytes as input to HHH1 as a >>>>>>>>>>>>>>>>>>> verified >>>>>>>>>>>>>>>>>>> fact. >>>>>>>>>> What does "specify to" mean? Which behaviour is correct? >>>>>>>>>> >>>>>>>>>>>>>>> DDD EMULATED BY HHH DOES SPECIFY THAT IT CANNOT POSSIBLY >>>>>>>>>>>>>>> REACH ITS >>>>>>>>>>>>>>> OWN FINAL HALT STATE. >>>>>>>>>>>>>> How does HHH emulate the call to HHH instruction >>>>>>>>>>>>> The semantics of the x86 language. >>>>>>>>>>>> Right, which were defined by INTEL, and requires the data >>>>>>>>>>>> emulated to >>>>>>>>>>>> be part of the input. >>>>>>>>>>> It is part of the input in the sense that HHH must emulate >>>>>>>>>>> itself >>>>>>>>>>> emulating DDD. HHH it the test program thus not the program- >>>>>>>>>>> under- test. >>>>>>>>>> It is part of the program under test, being called by it. >>>>>>>>>> That's what >>>>>>>>>> you call a pathological relationship. >>>>>>>>>> >>>>>>>>>>> HHH is not asking does itself halt? >>>>>>>>>> Yes it is saying "I can't simulate this". >>>>>>>>>> >>>>>>>>>>> It was encoded to always halt for >>>>>>>>>>> such inputs. HHH is asking does this input specify that it >>>>>>>>>>> reaches its >>>>>>>>>>> own final halt state? >>>>>>>>>> Which it does (except when simulated by HHH). >>>>>>>>>> >>>>>>>>>>>> Is it guessing based on your limited input that doesn't >>>>>>>>>>>> contain the >>>>>>>>>>>> code at 000015d2, or >>>>>>>>>>>> Is it admitting to not being a pure function, by looking >>>>>>>>>>>> outsde the >>>>>>>>>>>> input to the function (since you say that above is the full >>>>>>>>>>>> input), or >>>>>>>>>>>> Are you admitting all of Halt7.c/obj as part of the input, >>>>>>>>>>>> and thus you >>>>>>>>>>>> hae a FIXED definition of HHH, which thus NEVER does a complete >>>>>>>>>>>> emulation, and thus you can't say that the call to HHH is a >>>>>>>>>>>> complete >>>>>>>>>>>> emulation. >>>>>>>>>>>> >>>>>>>>>>>>> How we we determine that DDD emulated by HHH cannot >>>>>>>>>>>>> possibly reach its >>>>>>>>>>>>> final halt state? >>>>>>>>>>>>> Two recursive emulations provide correct inductive proof. >>>>>>>>>>>> Nope, because if you admit to the first two lies, your HHH >>>>>>>>>>>> never was a >>>>>>>>>>>> valid decider, >>>>>>>>> >>>>>>>>> It is ALWAYS CORRECT for any simulating termination >>>>>>>>> analyzer to stop simulating and reject any input >>>>>>>>> that would otherwise prevent its own termination. >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>>> Except when doing so changes the input, as is the case with HHH >>>>>>>> and DDD. >>>>>>>> >>>>>>>> Changing the input is not allowed. >>>>>>> >>>>>>> I have already addressed your misconception that the input is >>>>>>> changed. >>>>>>> >>>>>> >>>>>> No, it is YOUR misconception. The algorithm DDD consists of the >>>>>> function DDD, the function HHH, and everything that HHH calls down >>>>>> to the OS level. >>>>>> >>>>> >>>>> We have already been over this. >>>>> HHH(DDD) and HHH1(DDD) have the same inputs all the way >>>>> down to the OS level. >>>> >>>> So you agree that the input to both is the immutable code of the >>>> function DDD, the immutable code of the function HHH, and the >>>> immutable code of everything that HHH calls down to the OS level. >>>> >>> >>> It is the input in terms of the behavior of DDD emulated >>> by HHH, yet only DDD is the program-under-test. >> >> False. The function DDD by itself is not a program. The function >> DDD, the function HHH, and everything that HHH calls down the OS level >> are *all* under test. >> > > *Simulating termination analyzer Principle* > It is always correct for any simulating termination > analyzer to stop simulating and reject any input > that would otherwise prevent its own termination. > Repeat of previously refuted point: On 3/31/2025 6:17 PM, dbush wrote: ========== REMAINDER OF ARTICLE TRUNCATED ==========