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Path: ...!weretis.net!feeder8.news.weretis.net!reader5.news.weretis.net!news.solani.org!.POSTED!not-for-mail From: Mild Shock <janburse@fastmail.fm> Newsgroups: sci.logic,comp.theory Subject: Re: Truth Bearer or Truth Maker Date: Thu, 25 Jul 2024 11:42:27 +0200 Message-ID: <v7t6m2$b7d9$1@solani.org> References: <v7rohj$9t9k$2@solani.org> <v7rpra$1sv5t$2@dont-email.me> <v7rsko$9vkk$1@solani.org> <v7rtu5$1tp9a$1@dont-email.me> <e197c26d636042212a7a60c04d8dff0803bb2503@i2pn2.org> <v7s6v0$1v7h9$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Thu, 25 Jul 2024 09:42:26 -0000 (UTC) Injection-Info: solani.org; logging-data="368041"; mail-complaints-to="abuse@news.solani.org" User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0 SeaMonkey/2.53.18.2 Cancel-Lock: sha1:pS1rKKfwUZNOUtvMQwwOOkfLVMk= X-User-ID: eJwFwQkBwDAIA0BLlCcUOawE/xJ2F4aDl46Ax8YeI6Dfkr4+REbJZXo91Bea2ipxq9pKRmhJsFtn9pmuxA9MMhV2 In-Reply-To: <v7s6v0$1v7h9$1@dont-email.me> Bytes: 2212 Lines: 34 Most of the fallacies arise, since originally logic was only made for the every day finite. Applying it to the infinite automatically gets you into muddy waters. Take sentence such as Goldbach's conjecture every even natural number greater than 2 is the sum of two prime numbers It contains a forall quantifier. And its an infinite forall quantifier. Its a not a finite quantifier such as "all my kitchen utils", its an infinite quantifier "every even natural number". In the intented model of arithmetic the above sentence has a truth value. By classical logic we should even have, this is a form of LEM, namely: ∀x G(x) v ∃x ~G(x) Without knowning which one of the sides is true, and without knowing whether we look at the intented model of arithmetic or not. Such a generalization is for example rejected in intuitionistic logic, which tries to regain some of the "finite" character of logic. olcott schrieb: > In other words there really is no such thing as true > because "a fish" is neither true nor false in English.