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|    comp.ai.philosophy    |    Perhaps we should ask SkyNet about this    |    59,235 messages    |
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|    Message 59,109 of 59,235    |
|    olcott to Richard Damon    |
|    =?UTF-8?Q?Re=3A_G=C3=B6del=27s_G_has_nev    |
|    18 Jan 26 12:38:52    |
      XPost: comp.theory, sci.logic, sci.math       From: polcott333@gmail.com              On 1/18/2026 11:37 AM, Richard Damon wrote:       > On 1/17/26 11:38 PM, olcott wrote:       >> On 1/17/2026 10:13 PM, Richard Damon wrote:       >>> On 1/17/26 10:59 PM, olcott wrote:       >>>> On 1/17/2026 9:20 PM, Richard Damon wrote:       >>>>> On 1/17/26 8:59 PM, olcott wrote:       >>>>>> On 1/17/2026 7:46 PM, Richard Damon wrote:       >>>>>>> On 1/17/26 8:30 PM, olcott wrote:       >>>>>>>> On 1/17/2026 7:20 PM, Richard Damon wrote:       >>>>>>>>> On 1/17/26 7:49 PM, olcott wrote:       >>>>>>>>>> On 1/17/2026 6:14 PM, Richard Damon wrote:       >>>>>>>>>>> On 1/17/26 5:50 PM, olcott wrote:       >>>>>>>>>>>> On 1/17/2026 3:54 PM, Richard Damon wrote:       >>>>>>>>>>>>> On 1/17/26 4:08 PM, olcott wrote:       >>>>>>>>>>>>>> For nearly a century, discussions of arithmetic have quietly       >>>>>>>>>>>>>> relied on a fundamental conflation: the idea that       >>>>>>>>>>>>>> “true in arithmetic” meant “true in the standard model of       ℕ.”       >>>>>>>>>>>>>> But PA itself has no truth predicate, no internal semantics,       >>>>>>>>>>>>>> and no mechanism for assigning truth values. So what was       >>>>>>>>>>>>>> called “true in arithmetic” was always meta-theoretic truth       >>>>>>>>>>>>>> about arithmetic, imported from an external model and never       >>>>>>>>>>>>>> grounded inside PA.       >>>>>>>>>>>>>       >>>>>>>>>>>>> Nope, just shows you don't understand what TRUTH means.       >>>>>>>>>>>>>       >>>>>>>>>>>>       >>>>>>>>>>>> I’m distinguishing internal truth from external truth.       >>>>>>>>>>>> PA has no internal truth predicate, so it cannot express       >>>>>>>>>>>> or evaluate truth internally.       >>>>>>>>>>>>       >>>>>>>>>>>> The only notion of truth available for PA is the external,       >>>>>>>>>>>> model‑theoretic one — which is meta‑theoretic by definition.       >>>>>>>>>>>       >>>>>>>>>>> But Truth *IS* Truth, or you are just misdefining it.       >>>>>>>>>>>       >>>>>>>>>>> The fact that a system can't tell you the truth value of a       >>>>>>>>>>> statement doesn't mean the statement doesn't have a truth value.       >>>>>>>>>>>       >>>>>>>>>>> And, the problem is that, as was shown, systems with a truth       >>>>>>>>>>> predicate CAN'T support PA or they are inconsistant.       >>>>>>>>>>>       >>>>>>>>>>> I guess systems that lie aren't a problem to you since you       >>>>>>>>>>> think lying is valid logic.       >>>>>>>>>>>       >>>>>>>>>>>>       >>>>>>>>>>>>>>       >>>>>>>>>>>>>> This conflation was rarely acknowledged, and it shaped the       >>>>>>>>>>>>>> interpretation of Gödel’s incompleteness theorems,       >>>>>>>>>>>>>> independence       >>>>>>>>>>>>>> results like Goodstein and Paris–Harrington, and the entire       >>>>>>>>>>>>>> discourse around “true but unprovable” statements.       >>>>>>>>>>>>>       >>>>>>>>>>>>> WHich Godel proves exsits.       >>>>>>>>>>>>>       >>>>>>>>>>>>>>       >>>>>>>>>>>>>> My work begins by correcting this foundational error.       >>>>>>>>>>>>>       >>>>>>>>>>>>> By LYING and destroying the meaninf of truth.       >>>>>>>>>>>>>       >>>>>>>>>>>>>>       >>>>>>>>>>>>>> PA has no internal truth predicate, so classical claims of       >>>>>>>>>>>>>> “true in arithmetic” were always meta-theoretic. My system       >>>>>>>>>>>>>> introduces a truth predicate whose meaning is anchored       >>>>>>>>>>>>>> entirely in PA’s axioms and inference rules, not in external       >>>>>>>>>>>>>> models. Any statement whose meaning requires meta-theoretic       >>>>>>>>>>>>>> interpretation or non-well-founded self-reference is rejected       >>>>>>>>>>>>>> as outside the domain of PA. This yields a coherent, internal       >>>>>>>>>>>>>> notion of truth in arithmetic for the first time.       >>>>>>>>>>>>>>       >>>>>>>>>>>>>       >>>>>>>>>>>>> Not having a "Predicate" doesn't mean not having a       >>>>>>>>>>>>> definition of truth.       >>>>>>>>>>>>>       >>>>>>>>>>>>       >>>>>>>>>>>> A meta‑theoretic definition of truth is not the same       >>>>>>>>>>>> as an internal truth predicate. Tarski’s definition of       >>>>>>>>>>>> truth for arithmetic is external to PA and cannot be       >>>>>>>>>>>> expressed inside PA. That’s exactly the distinction       >>>>>>>>>>>> I’m drawing.       >>>>>>>>>>>       >>>>>>>>>>> No, he shows that any system that support PA and a Truth       >>>>>>>>>>> Predicate is inconstant.       >>>>>>>>>>>       >>>>>>>>>>> It seems you just want to let your system be inconsistent, as       >>>>>>>>>>> then you can "prove" whatever you want.       >>>>>>>>>>>       >>>>>>>>>>>>       >>>>>>>>>>>> PA can prove statements, but it cannot assert that       >>>>>>>>>>>> those statements are true. Those are different notions.       >>>>>>>>>>>       >>>>>>>>>>> Right, but statments in PA can be True even without such a       >>>>>>>>>>> predicate.       >>>>>>>>>>>       >>>>>>>>>>       >>>>>>>>>> Unless PA can prove it then they never were actually       >>>>>>>>>> true in PA. They were true outside of PA in meta-math.       >>>>>>>>>>       >>>>>>>>>       >>>>>>>>> Sure it is. Truth goes beyond knowledge.       >>>>>>>>>       >>>>>>>>       >>>>>>>> You're assuming 'truth in arithmetic' means truth-in-the-       >>>>>>>> standard- model. But that's a meta-theoretic construct—it's       >>>>>>>> truth about arithmetic from outside PA, not truth in arithmetic.       >>>>>>>> PA has no internal truth predicate and no way to access the       >>>>>>>> standard model from within.       >>>>>>>       >>>>>>> No, PA (Peano Arithmetic) itself defines the numbers and the       >>>>>>> arithmatic.       >>>>>>>       >>>>>>> Why do you think otherwise?       >>>>>>>       >>>>>>> And why does it NEED to access the model from within?       >>>>>>>       >>>>>>       >>>>>> Gödel‑style incompleteness only appears when “truth” is       >>>>>> defined using an outside model of the natural numbers.       >>>>>       >>>>> No, it uses the innate properties of the Natural Nubmers.       >>>>>       >>>>       >>>> meta-math is outside of math.       >>>>       >>>>>>       >>>>>> If you stop using model‑theoretic truth and rely only       >>>>>> on the meanings that come from the rules of the system       >>>>>> itself, then “true” and “provable” coincide — so the       >>>>>> incompleteness gap never arises.       >>>>>       >>>>> That doesn't make sense. The answer to the arithmatic doesn't       >>>>> depend on anything outside the rules, as numbers mean themselves.       >>>>>       >>>>> That a number statisfies the relationship derived doesn't depend on       >>>>> anything outside of that arithmatic.       >>>>>       >>>>       >>>> meta-math is outside of math.       >>>       >>> No, it uses just the math of PA.       >>>       >>> The meta-system just embues some additional meaning into the numbers.       >>>       >>       >> That is where it steps outside of math       >       > But that meaning doesn't actually affect the results in the system, only       > to let us KNOW the results.       >              ∀x ∈ PA ((True(PA, x) ≡ (PA ⊢ x))       ∀x ∈ PA ((False(PA, x) ≡ (PA ⊢ ~x))       ∀x ∈ PA (~TruthBearer(PA, x) ≡ (~True(PA, x) ∧ (~False(PA, x))                     [continued in next message]              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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