Forums before death by AOL, social media and spammers... "We can't have nice things"
|    sci.logic    |    Logic -- math, philosophy & computationa    |    262,912 messages    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
|    Message 262,640 of 262,912    |
|    olcott to Richard Damon    |
|    =?UTF-8?Q?Re=3A_G=C3=B6del=27s_G_has_nev    |
|    20 Jan 26 22:54:58    |
      XPost: sci.math, comp.theory, comp.ai.philosophy       From: polcott333@gmail.com              On 1/20/2026 10:04 PM, Richard Damon wrote:       > On 1/20/26 4:23 PM, olcott wrote:       >> On 1/19/2026 11:29 PM, Richard Damon wrote:       >>>> My system is not supposed to decide in advance whether       >>>> Goldbach is well‑founded. A formula becomes a truth‑bearer       >>>> only when PA can classify it in finitely many steps.       >>>> Goldbach may or may not be classifiable; that’s an open       >>>> computational fact, not a semantic requirement. This has       >>>> no effect on Gödel, because Gödel’s sentence is structurally       >>>> non‑truth‑bearing, not merely unclassified.       >>>       >>> Which shows that you don't understand what logic systems are.       >>>       >>> The don't "Decide" on truths, they DETERMINE what is true.       >>>       >>> Your problem is that either there is, or there isn't a finite length       >>> proof of the statement.       >>>       >>> Semantics can't change in a formal system, or they aren't really       >>> semantics.       >>>       >>> Your problem is you don't understand Godel statement, as it *IS*       >>> truth bearing as it is a simple statement with no middle ground, does       >>> a number exist that satisfies a given relationship. Either there is,       >>> or there isn't. No other possiblity.       >>>       >>> You confuse yourself by forgetting that words have actual meaning,       >>> and that meaning can depend on using the right context.       >>>       >>> Godel's G is a statement in the system PA.       >>>       >>> It is a statement about the non-existance of a natural number that       >>> satisfies a particular computable realtionship.       >>>       >>> It is a statement defined purely by mathematics and thus doesn't       >>> "depend" on other meaning.       >>>       >>> It is a mathematical FACT, that for this relationship, no matter what       >>> natural number we test, none will satisfy it, so its assertation that       >>> no number satisfies it makes it true.       >>       >> PA augmented with its own True(PA,x) and False(PA,x)       >> is a decider for Domain of every expression grounded       >> in the axioms of PA.       >       > No, it becomes inconsistant.       >       >>       >> A system at a higher level of inference than PA can       >> reject any expressions that define a cycle in the       >> directed graph of the evaluation sequence of PA       >> expressions. Then PA could test back chained inference       >> from expression x and ~x to the axioms of PA.       >>       >       > But there is no "cycle" in the statement of G. It is PURELY a statement       > of the non-existance of a number that satisfies a purely mathematic       > relationship (which has no meaning by itself in PA).       >              Even the relationship cannot exist |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
(c) 1994, bbs@darkrealms.ca