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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Mikko <mikko.levanto@iki.fi> Newsgroups: sci.logic Subject: Re: Undecidability based on epistemological antinomies V2 --Mendelson-- Date: Sat, 27 Apr 2024 11:18:21 +0300 Organization: - Lines: 37 Message-ID: <v0iccd$8odv$1@dont-email.me> References: <uvq0sg$21m7a$1@dont-email.me> <uvq359$1doq3$4@i2pn2.org> <uvrbvs$2acf7$1@dont-email.me> <uvs70t$1h01f$1@i2pn2.org> <uvsgcl$2i80k$1@dont-email.me> <uvsj4v$1h01e$1@i2pn2.org> <uvsknc$2mq5c$1@dont-email.me> <uvvrj6$3i152$1@dont-email.me> <v00r07$3oqra$1@dont-email.me> <v02ggt$6org$1@dont-email.me> <v03866$bitp$1@dont-email.me> <v056us$rmqi$1@dont-email.me> <v08i2i$1m5hp$2@dont-email.me> <v0akj8$28ghd$1@dont-email.me> <v0bada$2defp$2@dont-email.me> <v0d42v$2tclm$1@dont-email.me> <v0dp8c$31vd9$1@dont-email.me> <v0fpdc$3j50e$1@dont-email.me> <v0gh69$3oudg$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sat, 27 Apr 2024 10:18:22 +0200 (CEST) Injection-Info: dont-email.me; posting-host="202a73c059a7b8a8ab6f5ac88cf061f3"; logging-data="287167"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+w8w08B9nZrMqGcos2hbe+" User-Agent: Unison/2.2 Cancel-Lock: sha1:PnG6x1iat1GVfrNloz9MOXwAa9o= Bytes: 2739 On 2024-04-26 15:28:08 +0000, olcott said: > On 4/26/2024 3:42 AM, Mikko wrote: >> On 2024-04-25 14:27:23 +0000, olcott said: >> >>> On 4/25/2024 3:26 AM, Mikko wrote: >>>> epistemological antinomy >>> >>> It <is> part of the current (thus incorrect) definition >>> of undecidability because expressions of language that >>> are neither true nor false (epistemological antinomies) >>> do prove undecidability even though these expressions >>> are not truth bearers thus not propositions. >> >> That a definition is current does not mean that is incorrect. >> > > ...14 Every epistemological antinomy can likewise be used for a similar > undecidability proof...(Gödel 1931:43-44) > >> An epistemological antinomy can only be an undecidable sentence >> if it can be a sentence. What epistemological antinomies you >> can find that can be expressed in, say, first order goup theory >> or first order arithmetic or first order set tehory? >> > > It only matters that they can be expressed in some formal system. > If they cannot be expressed in any formal system then Gödel is > wrong for a different reason. How is it relevant to the incompleteness of a theory whether an epistemological antińomy can be expressed in some other formal system? -- Mikko