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: Mathematical incompleteness has always been a misconception --- Tarski Date: Sat, 1 Mar 2025 14:53:23 -0600 Organization: A noiseless patient Spider Lines: 69 Message-ID: References: <7e532aaf77653daac5ca2b70bf26d0a3bc515abf@i2pn2.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sat, 01 Mar 2025 21:53:25 +0100 (CET) Injection-Info: dont-email.me; posting-host="7b4f06e456023699d538e77dba30bc57"; logging-data="380649"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+Ymv4CYhBoo2wSvPaUkiwd" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:i1yE9cZOl/87fi7sTqHYAlwDWSw= X-Antivirus-Status: Clean Content-Language: en-US X-Antivirus: Norton (VPS 250301-6, 3/1/2025), Outbound message In-Reply-To: Bytes: 4503 On 3/1/2025 3:14 AM, Mikko wrote: > On 2025-02-28 23:51:54 +0000, olcott said: > >> On 2/28/2025 5:13 AM, Mikko wrote: >>> On 2025-02-25 20:57:44 +0000, olcott said: >>> >>>> On 2/25/2025 9:40 AM, Mikko wrote: >>>>> On 2025-02-24 22:44:03 +0000, olcott said: >>>>> >>>>>> On 2/24/2025 3:04 AM, Mikko wrote: >>>>>>> On 2025-02-22 17:41:40 +0000, olcott said: >>>>>>> >>>>>>>> On 2/22/2025 3:15 AM, Mikko wrote: >>>>>>>>> On 2025-02-21 23:19:10 +0000, olcott said: >>>>>>>>> >>>>>>>>>> On 2/20/2025 2:54 AM, Mikko wrote: >>>>>>>>>>> On 2025-02-18 03:59:08 +0000, olcott said: >>>>>>>>>>> >>>>>>>> >>>>>>>>>> >>>>>>>>>> Tarski anchored his whole proof in the Liar Paradox. >>>>>>>>> >>>>>>>>> More specifically, to the idea that the Liar Paradox does not >>>>>>>>> have a >>>>>>>>> truth value. Do you reject that idea? >>>>>>>> >>>>>>>> This was not what Tarski was saying. >>>>>>> >>>>>>> Yes, he was. He just assumed that his readers already know that the >>>>>>> Liar Paradox does not have a truth value so he didn't need to be >>>>>>> emphatically explicit about that point. >>>>>> >>>>>> In other words you never read this: >>>>>> https://liarparadox.org/Tarski_275_276.pdf >>>>> >>>>> Did you? Nowhere on those pages he claims that the Liar paradox is >>>>> true >>>>> nor that the Liar paradox is false. >>>> >>>> We shall show that the sentence x is actually undecidable and at the >>>> same time true. >>> >>> At that point Tarski has alredy known that the sentence s can be >>> constructed >>> and that it can be represented by an object that the theory can handle. >>> Later Tarski ideed shows that the sentence x is both undecidable and >>> true. >>> But x is not the liar paradox. >> >> If you don't muck up the meanings > > That is hard to avoid in contexts where you do. > >> of common terms >> with idiomatic term-of-the-art meanings then true >> and undecidable is the impossibility of true without >> a truth-maker. > > Should this be interpreted according to the term-of-art menings or > common language meanings or some other meanings? > When we use provable(common) that means {shown to be definitely true by whatever means} then incompleteness and undecidability cannot exist. -- Copyright 2025 Olcott "Talent hits a target no one else can hit; Genius hits a target no one else can see." Arthur Schopenhauer