Forums before death by AOL, social media and spammers... "We can't have nice things"
|    comp.ai.philosophy    |    Perhaps we should ask SkyNet about this    |    59,235 messages    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
|    Message 59,068 of 59,235    |
|    olcott to Richard Damon    |
|    Re: Proof Theoretic Semantics Blocks Pat    |
|    16 Jan 26 14:24:29    |
      XPost: comp.theory, sci.logic, sci.math       XPost: comp.lang.prolog       From: polcott333@gmail.com              On 1/16/2026 1:34 PM, Richard Damon wrote:       > On 1/16/26 2:16 PM, olcott wrote:       >> On 1/16/2026 12:52 PM, Richard Damon wrote:       >>> On 1/16/26 12:47 PM, olcott wrote:       >>>> The system uses proof-theoretic semantics, where the       >>>> meaning of a statement is determined entirely by its       >>>> inferential role within a theory. A theory T consists       >>>> of a finite set of basic statements together with       >>>> everything that can be derived from them using the       >>>> inference rules. The statements derivable in this       >>>> way are the theorems of T. A statement is true in       >>>> T exactly when T proves it. A statement is false       >>>> in T exactly when T proves its negation. Some       >>>> statements are neither true nor false in T. These       >>>> are the non-well-founded statements: statements       >>>> whose inferential justification cannot be grounded       >>>> in a finite, well-founded proof structure. This includes       >>>> self-referential constructions such as Gödel-type sentences.       >>>>       >>>> *Proof Theoretic Semantics Blocks Pathological Self-Reference*       >>>> https://philpapers.org/archive/OLCPTS.pdf       >>>>       >>>       >>> WHAT system?       >>>       >>> WHAT can you do in it?       >>>       >>> Can you actually prove that, or is it just more of your lies.       >>>       >>       >> You have to actually read the paper.       >       > I did. Where do you actually define the initial axioms of your syste,/       >       >>       >>> Your problem is that you system is based on a criteria that matches       >>> your own definition of non-well-founded.       >>>       >>       >> What does not well-founded mean in proof-theoretic semantics?       >       > So. how is your definition of the criteria to be non-well-founded not       > non-well-founded for some questions?       >       > Note, asking LLMs for a definition doesn't define it in your system.       >       >>       >> In proof‑theoretic semantics, a statement is not well‑founded when its       >> justification cannot be grounded in a finite, well‑structured chain of       >> inferential steps. It lacks a terminating, well‑ordered proof tree       >> that would normally establish its truth or falsity. This often happens       >> with self‑referential or circular statements whose “proofs” loop back       >> on themselves rather than bottoming out in basic axioms or       >> introduction rules. // Copilot       >>       >> In proof-theoretic semantics, saying that something is “not well-       >> founded” means that the structure used to define or justify meanings       >> does not rest on a base case that is independent of itself. Instead,       >> it involves circular or infinitely descending dependencies among rules       >> or proofs. // ChatGPT       >>       >> In proof-theoretic semantics, not well-founded typically refers to       >> derivations or proof structures that contain infinite descending       >> chains or circular dependencies, violating the well-foundedness property.       >> In classical proof theory, well-founded derivations have a clear       >> hierarchical structure where every inference rule application depends       >> only on "smaller" or "simpler" premises, eventually bottoming out in       >> axioms or basic rules. This ensures that proofs are finitely       >> constructible and verifiable. // Claude AI       >>       >> A set of introduction rules (definitional clauses) for an atom P is       >> called well-founded if every chain of successive "definitions"       >> (unfoldings) eventually terminates — i.e., there is no infinite       >> descending chain of definitional dependencies.       >> Intuitively:       >> The meaning of P is ultimately grounded in basic facts or in logical       >> structure after finitely many unfoldings. // Grok       >>       >>       >       > And, thus, your "definition" of non-well-founded              Is the standard definition in truth theoretic semantics making       "true on the basis of meaning expressed in language"       reliably computable for the entire body of knowledge.              This includes expressing all of PA in a complete system.              --       Copyright 2026 Olcott |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
(c) 1994, bbs@darkrealms.ca