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We demonstrate that providing explicit trajectory encodings substantially restores physical consistency across all evaluated models, revealing a functional disentanglement between vision and language: egomotion logic is derived almost exclusively from the language modality, while visual observations contribute negligible additional signal.","weakest_assumption":"The deterministic oracle accurately and unbiasedly maps continuous vehicle kinematics to discrete motion concepts, and the benchmark tasks isolate perception from other model capabilities without introducing confounding factors."}},"verdict_id":"96daf71d-32f3-4fc8-b5c4-37c76086a788"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:4a4f8fee20848c4b6f3b5c2720f8cf2c0fcc7eeef956146ed048856cf5e1d6f9","target":"record","created_at":"2026-07-08T01:19:13Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"3a48833869f746eaac78a46ed321385724be23d5f93032fea15757fc92230924","cross_cats_sorted":["cs.CL","cs.RO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-04-22T07:49:02Z","title_canon_sha256":"a128506afe8c73951c8e331fd6c453891df8ef56af1a64c089f3bee35fb2b36f"},"schema_version":"1.0","source":{"id":"2604.22851","kind":"arxiv","version":2}},"canonical_sha256":"32d46057b7f9b3ea1f58c3b7f5c535d29bd03f025b0062d741117e1c65a4537d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"32d46057b7f9b3ea1f58c3b7f5c535d29bd03f025b0062d741117e1c65a4537d","first_computed_at":"2026-07-08T01:19:13.427070Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-08T01:19:13.427070Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ncI6RqE3PJE2LIgac1ke+Hv1cJFxObbkDtweDdLuk3cIp3IjNSQifmwxt4n36XxV5IcfMp5+5kL8uiUikeTWBA==","signature_status":"signed_v1","signed_at":"2026-07-08T01:19:13.427749Z","signed_message":"canonical_sha256_bytes"},"source_id":"2604.22851","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ecfbab9590b349b31751c712ec3084e91971c0ae8bc5612633308eca9d3824cb","sha256:4a4f8fee20848c4b6f3b5c2720f8cf2c0fcc7eeef956146ed048856cf5e1d6f9","sha256:af05f831f4161c2ac3c22fbe986b97489cfd04b3a7e9ef102b9fda158e669fa2"],"state_sha256":"6a7b1394aaaba7b7cfacd64b0abf653d382ad213a33cb020a15e5f59c9b4dab9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tn1cmtgRJBmkQzhpeUz92S/rGHOISGGcV8+m669RUzlTX6ogXpGj4PaJx6C1hIibLmJceplkDZbjwZ/O0fl3Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T19:53:45.006199Z","bundle_sha256":"f01cadc52a0a14093befe468ae2aae710389a582462648ce7b41a49ca2d4b092"}}