Pith Number

pith:X4X2BQTH

pith:2026:X4X2BQTHUCHLLT2S3OI6CDLSK7

not attested not anchored not stored refs pending

Position: Vision-Language-Action Models Cannot Be Verified to Perform Physical Reasoning

Huaming Chen, Ian Manchester, Taozhao Chen

arxiv:2606.30686 v1 · 2026-06-28 · cs.RO · 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{X4X2BQTHUCHLLT2S3OI6CDLSK7}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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.

Receipt and verification

First computed	2026-07-01T00:17:13.551162Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf2fa0c267a08eb5cf52db91e10d7257f2ff082d75b80b80332b0c807b141c50

Aliases

arxiv: 2606.30686 · arxiv_version: 2606.30686v1 · doi: 10.48550/arxiv.2606.30686 · pith_short_12: X4X2BQTHUCHL · pith_short_16: X4X2BQTHUCHLLT2S · pith_short_8: X4X2BQTH

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/X4X2BQTHUCHLLT2S3OI6CDLSK7 \
  | 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: bf2fa0c267a08eb5cf52db91e10d7257f2ff082d75b80b80332b0c807b141c50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd1f003158ada4df4957e53a3b5ede7f6fe2ac367499e1915663da39464714ca",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.RO",
    "submitted_at": "2026-06-28T14:03:57Z",
    "title_canon_sha256": "c69232474bfa13f1bcb6c32ae0729bf3b1b1512c73846fb4d0c3ad55c8e62477"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.30686",
    "kind": "arxiv",
    "version": 1
  }
}