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|    comp.ai.philosophy    |    Perhaps we should ask SkyNet about this    |    59,235 messages    |
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|    Message 59,069 of 59,235    |
|    olcott to Richard Damon    |
|    Re: Proof Theoretic Semantics Blocks Pat    |
|    16 Jan 26 14:51:14    |
      XPost: comp.theory, sci.logic, sci.math       XPost: comp.lang.prolog       From: polcott333@gmail.com              On 1/16/2026 2:34 PM, Richard Damon wrote:       > On 1/16/26 3:24 PM, olcott wrote:       >> 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.       >>       >       > I think not.       >       > One problem you are going to run into is that this "entire body of       > knowledge" is itself not built on those semantics,       >              I knew that this would be philosophically too deep       for you so I am using PA to build a bridge.              > It is a problem trying to process "knowledge" based on a different logic       > than the logic you are trying to process it.       >       > Also, part of our knowledge is about mathematics, which, for instance       > will assert that the Goldbach Conjecture is one of the great puzzles of       > mathematics, and must either be true or false, but that FACT is       > incompatible with proof-theoretic semantics, as mathematics can show       > that some true statements do not have proofs in the system.       >              You seem to keep forgetting the specified domain       is the body of knowledge that is       "true on the basis of meaning expressed in language"              > Thus, your system colapses in a contradiction that the statement might       > be not-well-founded, but that classification might be not-well-founded,       > and that determination may be not-well-founded, and so on, so your       > attempt to define you system runs into a possibly infinite loop of       > asking if we can even talk about the statement.       >              My paper already explains all of the details of that.              Proof Theoretic Semantics Blocks Pathological Self-Reference       https://philpapers.org/archive/OLCPTS.pdf              > If you disagree, it falls upon YOU to figure out how to handle that       > issue, you can't just assume it can be done.       >                     --       Copyright 2026 Olcott |
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