Pith Number

pith:FHTOVCWB

pith:2025:FHTOVCWBR7GES7QMPXIC2BEHB7

not attested not anchored not stored refs pending

A Single Direction of Truth: An Observer Model's Linear Residual Probe Exposes and Steers Contextual Hallucinations

Charles O'Neill, Chi Chi Zhao, Max Kirkby, Mudith Jayasekara, Slava Chalnev

arxiv:2507.23221 v1 · 2025-07-31 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FHTOVCWBR7GES7QMPXIC2BEHB7}

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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.

Cited by

2 papers in Pith

Painless Activation Steering: An Automated, Lightweight Approach for Post-Training Large Language Models

PARALLAX: Separating Genuine Hallucination Detection from Benchmark Construction Artifacts

Receipt and verification

First computed	2026-07-05T11:46:07.799189Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29e6ea8ac18fcc497e0c7dd02d04870fcedf41b15a8aba07837d4e967a19f131

Aliases

arxiv: 2507.23221 · arxiv_version: 2507.23221v1 · doi: 10.48550/arxiv.2507.23221 · pith_short_12: FHTOVCWBR7GE · pith_short_16: FHTOVCWBR7GES7QM · pith_short_8: FHTOVCWB

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/FHTOVCWBR7GES7QMPXIC2BEHB7 \
  | 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: 29e6ea8ac18fcc497e0c7dd02d04870fcedf41b15a8aba07837d4e967a19f131

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5f9e6039c14cb06b38fec9575d18518777de0e16c825ef02dcd3eb8a785081a8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-07-31T03:26:57Z",
    "title_canon_sha256": "11b15119a4c22c7935a0ad99c5bccceb3cc50766af1723cec021f3103a562bd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.23221",
    "kind": "arxiv",
    "version": 1
  }
}