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|    Message 262,319 of 262,912    |
|    olcott to Tristan Wibberley    |
|    Re: have we been misusing incompleteness    |
|    02 Jan 26 08:44:24    |
      XPost: comp.theory, sci.math       From: polcott333@gmail.com              On 1/2/2026 12:20 AM, Tristan Wibberley wrote:       > On 02/01/2026 00:23, Richard Damon wrote:       >> On 1/1/26 7:12 PM, Tristan Wibberley wrote:       >>> On 01/01/2026 23:50, Richard Damon wrote:       >>>> On 1/1/26 6:17 PM, Tristan Wibberley wrote:       >>>>> On 01/01/2026 22:42, Richard Damon wrote:       >>>>>> On 1/1/26 5:13 PM, Tristan Wibberley wrote:       >>>>>>> On 01/01/2026 00:35, Richard Damon wrote:       >>>>>>>       >>>>>>>> THe statement G exist       >>>>>>>       >>>>>>>       >>>>>>> Ah, I'm not so easily convinced       >>>>>>>       >>>>>>>       >>>>>>       >>>>>> What did he do that might allow it not to exist?       >>>>>>       >>>>>> He constructs it by the rules of F, and shows that for it to not be       >>>>>> true, F must be inconsistant.       >>>>>>       >>>>>> You can't just complain that you don't think something exists, when it       >>>>>> was constructed by the system.       >>>>>       >>>>>       >>>>> There's no symbol "G" in the system.       >>>>>       >>>>>       >>>>       >>>> Sure there is, as system allow the creation of names for objects in       >>>> them.       >>>>       >>>> Name a system that meets the basic requirements that doesn't allow the       >>>> creation of a "name" for a statement in the system.       >>>       >>> Nope. The name is not a statement of the system, it's a statement of a       >>> related system such as a meta-system or extension.       >>>       >>>       >>       >> No, G is the statement created in the system, using the mathematical       >> relationship defined in terms of operations in the system build in the       >> meta system.       >>       >> G HAS to be in the system, so the PRR can refer to it.       >>       >> OR, are you saying that in the system of arithmetic, we can't talk about       >> a variable "x" as it isn't defined in the system?       >       >       > Godel's system P has variable objects, but no indeterminates. And it's       > namespace of Godel numbers is full up. You can do /some/ things like       > definitions using existential and universal quantification but the       > character of the propositions is different than a definition of a new       > symbol due to the Godel numbering; you have to be careful and not throw       > statements around like Goedel's introductory simile based on PM.       >              His paper is a convoluted mess hiding this simple fact       ...We are therefore confronted with a proposition which       asserts its own unprovability. 15 … (Gödel 1931:40-41)              Gödel, Kurt 1931.       On Formally Undecidable Propositions of       Principia Mathematica And Related Systems                     --       Copyright 2025 Olcott |
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