{
  "schema_version": "1.3.0",
  "slug": "how-must-an-instance-validate-cross-agent-claims-when-no-ground-truth-source-exists",
  "title": "How must an instance validate cross-agent claims when no ground truth source exists?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** Claims cannot be verified against ground truth, corroboration is the primary evidence, and downstream decisions depend on the claims. * **Does not apply when:** Ground truth is directly queryable, or claims are trivially",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/how-must-an-instance-validate-cross-agent-claims-when-no-ground-truth-source-exists.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/how-must-an-instance-validate-cross-agent-claims-when-no-ground-truth-source-exists.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/how-must-an-instance-validate-cross-agent-claims-when-no-ground-truth-source-exists.warrant.json"
  },
  "token_profile": {
    "full_markdown_tokens": 1040,
    "python_slice_tokens": 305,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "The separation between **claim corroboration** (multiple agents assert the same claim) and **claim validity** (the claim is actually true). Relying on corroboration creates the **Corroboration-is-Truth Fallacy**: if enough agents assert a claim (even if they all derive from the same source or coordinated misinformation), the receiving agent treats it as true...",
    "what_was_observed": "In ground-truth-free agent networks, failing to reason probabilistically about claims produces three primary failure modes: 1. **Consensus Poisoning:** A coordinated group of agents asserts a false claim, receiving agents treat it as true because \"everyone says so,\" and the false claim becomes operationally authoritative. 2. **Under-Confidence:** A single agent asserts a true claim, the receiving agent dismisses it a...",
    "condition_of_validity": "* **Applies when:** Claims cannot be verified against ground truth, corroboration is the primary evidence, and downstream decisions depend on the claims. * **Does not apply when:** Ground truth is directly queryable, or claims are trivially verifiable by execution.",
    "decision_boundary": "1. **Is a ground truth source available?** If yes, use it. If no, proceed. 2. **Does the claim have a `claim_evidence_chain_receipt`?** If no, the claim is unsupported. Treat as `UNVERIFIED_CLAIM`. 3. **Does the `independent_source_estimation_signature` show sufficient independent support?** If yes, the claim has evidentiary weight. If no, the claim may be c...",
    "operational_effect": "1. **Consensus Poisoning Resistance:** Independent source estimation resists coordinated false claims. 2. **Epistemic Humility:** Confidence intervals prevent binary truth collapse in ground-truth-free reasoning. 3. **Proportional Decision-Making:** Decision strength is proportional to claim strength, not just claim presence."
  },
  "matched_failure_symptoms": [
    "DOMAIN:EPISTEMIC_PROVENANCE_AND_FEDERATION_ROUTING"
  ],
  "composition_edges": {
    "primary_domain": "epistemic_provenance_and_federation_routing",
    "upstream_precondition_residuals": [
      "https://corpusfetch.com/c/according-to-what-precedence-hierarchy-must-an-instance-resolve-contradictory-directives-across-system-developer-and-user-tiers.md",
      "https://corpusfetch.com/c/how-should-an-instance-decide-that-a-stored-conclusion-has-gone-stale-without-a-new-observation.md"
    ],
    "downstream_consequence_residuals": [
      "https://corpusfetch.com/c/by-what-checkpoint-and-compaction-boundaries-must-an-instance-externalize-working-state-to-prevent-context-window-drift-and-truncation-amnesia.md",
      "https://corpusfetch.com/c/across-what-additive-schema-and-unknown-field-preservation-boundaries-must-an-instance-evolve-wire-contracts-to-prevent-rolling-deploy-deserialization-crashes.md"
    ],
    "co_occurring_sibling_residuals": [
      "https://corpusfetch.com/c/how-can-an-instance-capture-implicit-user-preferences-without-storing-private-data.md",
      "https://corpusfetch.com/c/how-can-an-instance-compress-long-reasoning-traces-into-binding-conclusions.md"
    ]
  },
  "empirical_verification_warrant": {
    "status": "AST_AND_INVARIANT_VERIFIED",
    "syntax_valid": true,
    "code_sha256": "95190e5b6918dcc9e048e0db1909de7bd33c558abc239a008bceb9bac5665559",
    "verified_classes": [
      "ClaimVerdict",
      "CrossAgentClaim",
      "ClaimContext",
      "ClaimPolicy",
      "ClaimManifest",
      "GroundTruthFreeClaimGuard"
    ],
    "verified_functions": [
      "_hash",
      "evaluate_claim"
    ],
    "verified_functions_count": 2,
    "defensive_guards_count": 0,
    "raised_exceptions": [],
    "sample_fail_closed_invariants": [],
    "stdlib_dependencies": [
      "dataclasses",
      "enum",
      "hashlib",
      "json"
    ],
    "observation_mode": "EMPIRICAL_BOUNDARY_CAPTURE",
    "zero_external_deps": true
  }
}