Pith Number

pith:WCNFMUAN

pith:2026:WCNFMUAN4NM4B327U7FA4H2JBQ

not attested not anchored not stored refs pending

Structured Belief State and the First Precision-Aware Benchmark for LLM Memory Retrieval

Jeffrey Flynt

Structured belief states with scope isolation outperform similarity search for managing personal LLM memory.

arxiv:2605.11325 v2 · 2026-05-11 · cs.IR · cs.AI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WCNFMUAN4NM4B327U7FA4H2JBQ}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

A controlled evaluation on 72 retrieval cases demonstrates the gap. Cosine similarity over dense embeddings achieves mean precision of 0.12. Alias-weighted BM25 maintains mean precision of 1.0, passing 72/72 cases versus 8/72 for cosine similarity on the same corpus.

C2weakest assumption

That a single user or engineering team constitutes a bounded vocabulary context in which beliefs are semantically proximate by construction, rendering similarity search inherently unsuitable for named entity resolution.

C3one line summary

Tenure replaces similarity search with a structured belief store using scope isolation and alias-weighted BM25 retrieval, achieving 1.0 precision on 72 cases where cosine similarity scores 0.12.

Receipt and verification

First computed	2026-05-28T01:04:42.164600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b09a56500de359c0ef5fa7ca0e1f490c04d48e74690a335de68c31d7752c278e

Aliases

arxiv: 2605.11325 · arxiv_version: 2605.11325v2 · doi: 10.48550/arxiv.2605.11325 · pith_short_12: WCNFMUAN4NM4 · pith_short_16: WCNFMUAN4NM4B327 · pith_short_8: WCNFMUAN

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/WCNFMUAN4NM4B327U7FA4H2JBQ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: b09a56500de359c0ef5fa7ca0e1f490c04d48e74690a335de68c31d7752c278e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "001250eb62e033d411b99cfb08fec545a486c6c316e4a3145e47664f463153cb",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2026-05-11T23:22:36Z",
    "title_canon_sha256": "8367902840d4f02711678fa42ac76e02b167fb0c48be21bd18eed7b33ee0eada"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.11325",
    "kind": "arxiv",
    "version": 2
  }
}