Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: olcott Newsgroups: sci.logic Subject: Re: The key undecidable instance that I know about --- Truth-bearers ONLY Date: Tue, 11 Mar 2025 18:12:33 -0500 Organization: A noiseless patient Spider Lines: 67 Message-ID: References: <3b57384a57c71e1880fe3f1df975003c1d743c07@i2pn2.org> <9a2fbcc7a803bc91d320117f8c8e03e03799e9b3@i2pn2.org> <95ca0b344ae29f6911a73c655ddbe1c7214f8519@i2pn2.org> <1955fb9d0d96f6e740c1a3845ab76c292dbfb750@i2pn2.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Wed, 12 Mar 2025 00:12:33 +0100 (CET) Injection-Info: dont-email.me; posting-host="da28212957632e1bc35b68d4fbc88507"; logging-data="2337967"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18A5Bs18d79K69kb1h4Lv/y" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:/4TMpZ/qLvKa7XnqLQv3QOupf4g= X-Antivirus: Norton (VPS 250311-4, 3/11/2025), Outbound message X-Antivirus-Status: Clean Content-Language: en-US In-Reply-To: <1955fb9d0d96f6e740c1a3845ab76c292dbfb750@i2pn2.org> Bytes: 3620 On 3/11/2025 6:12 AM, Richard Damon wrote: > On 3/10/25 10:39 PM, olcott wrote: >> On 3/10/2025 9:21 PM, Richard Damon wrote: >>> On 3/10/25 9:45 PM, olcott wrote: >>>> On 3/10/2025 5:45 PM, Richard Damon wrote: >>>>> On 3/9/25 11:39 PM, olcott wrote: >>>>>> >>>>>> LP := ~True(LP)  DOES SPECIFY INFINITE RECURSION. >>>>> >>>>> WHich is irrelevent, as that isn't the statement in view, only what >>>>> could be shown to be a meaning of the actual statement. >>>>> >>>> >>>> The Liar Paradox PROPERLY FORMALIZED Infinitely recursive >>>> thus semantically incorrect. >>> >>> But is irrelevent to your arguement. >>> >>> >>>> >>>> "It would then be possible to reconstruct the antinomy of the liar >>>>   in the metalanguage, by forming in the language itself a sentence" >>> >>> Right, the "Liar" is in the METALANGUAGE, not the LANGUAGE where the >>> predicate is defined. >>> >>> You are just showing you don't understand the concept of Metalanguage. >>> >>>> >>>> Thus anchoring his whole proof in the Liar Paradox even if >>>> you do not understand the term "metalanguage" well enough >>>> to know this. >>> >>> Yes, there is a connection to the liar's paradox, and that is that he >>> shows that the presumed existance of a Truth Predicate forces the >>> logic system to have to resolve the liar's paradox. >>> >> >> bool True(X) >> { >>    if (~unify_with_occurs_check(X)) >>      return false; >>    else if (~Truth_Bearer(X)) >>     return false; >>    else >>     return IsTrue(X); >> } >> >> LP := ~True(LP) >> True(LP) resolves to false. >> True(~LP) resolves to false. >> >> X = "A box of rocks" >> True(X) resolves to false. >> True(~X) resolves to false. >> >> > > Not the system that Tarski is using. > > *That is 100% of his complete error* -- Copyright 2025 Olcott "Talent hits a target no one else can hit; Genius hits a target no one else can see." Arthur Schopenhauer