Record 81677d2f3be44d8c9166fe3857411f25

FAIL

Verdict and provenance first; raw prompt/response/reasoning below, collapsed.

✕FAILanswered "basement" · model Nemotron 3 Nano 30B

finish_reason: stop · tokens in/out: 355/783 · cost: $0.000174 · latency: 9042.2 ms

belieftemplatestop

verifier_detail: kind=belief;campaign=1;adversarial=1;traps=final_true_state,last_mentioned_location,last_witnessed_by_anyone,most_frequent_location,query_agent_own_last_move;foil_score=5.0

trap kind(s) this world was seeded for: final_true_statelast_mentioned_locationlast_witnessed_by_anyonemost_frequent_locationquery_agent_own_last_move

lineage: 81677d2f

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Why did it fail? Nemotron 3 Ultra · live on Nebius Token Factory

Ultra reads the prompt, this answer, the verified correct answer and the difficulty settings, then explains the mistake. The verifier's own classification is shown next to it for comparison.

Prompt 1,116 chars · 355 tokens in

At 8:00, Silas brought the narrow box over to the basement. At 8:00, Kian was nearby and saw this happen. At 8:01, Silas took the narrow box and placed it in the boiler room. At 8:01, Kian happened to be watching. At 8:02, he took the narrow box and placed it in the basement. At 8:03, Silas carried the narrow box to the cafeteria. At 8:03, Kian was nearby and saw this happen. At 8:04, Lena moved the narrow box into the boiler room. At 8:04, he happened to be watching. At 8:05, she carried the narrow box to the greenhouse. At 8:05, he happened to be watching. At 8:06, Silas took the narrow box and placed it in the east wing. At 8:06, Kian noticed this from across the room. At 8:07, Lena took the narrow box and placed it in the basement. At 8:08, he brought the small basket over to the loading dock. At 8:09, Silas moved the small basket into the reception area. At 8:10, Kian reorganized some papers on the desk. At 8:11, Silas refilled a cup of coffee. At 8:12, Kian checked their email.

Where does Kian believe the narrow box is? Answer with only the location name (or 'unknown' if they have no belief).

Response 783 tokens out · finish: stop

basement

Reasoning 2,797 chars

Model reasoning

We need to infer where Kian believes the narrow box is, based on observations timeline. Kian is watching events. We need to track his beliefs about location of narrow box. Let's parse events:

- At 8:00, Silas brought the narrow box over to the basement. At 8:00, Kian was nearby and saw this happen. So Kian sees the narrow box being moved to the basement at 8:00.

- At 8:01, Silas took the narrow box and placed it in the boiler room. At 8:01, Kian happened to be watching. So Kian sees it moved from basement to boiler room? Actually he saw Silas take the narrow box and place it in the boiler room at 8:01. So Kian now believes it's in the boiler room.

- At 8:02, he took the narrow box and placed it in the basement. Wait "he" refers to Kian? The phrasing: "At 8:02, he took the narrow box and placed it in the basement." The subject "he" likely refers to Kian (since previous sentences about Kian). So Kian took the narrow box and placed it in the basement at 8:02. So Kian moves it to basement. So his belief updates: now it's in basement.

- At 8:03, Silas carried the narrow box to the cafeteria. At 8:03, Kian was nearby and saw this happen. So Kian sees Silas move the narrow box to cafeteria. But note: At 8:02, Kian moved it to basement. Then at 8:03, Silas moves it to cafeteria. Does Kian see that? Yes, he sees Silas carry the narrow box to the cafeteria. So he sees it being moved from basement to cafeteria. So his belief: now it's in cafeteria.

- At 8:04, Lena moved the narrow box into the boiler room. At 8:04, he happened to be watching. So Kian sees Lena move the narrow box into boiler room. So now he believes it's in boiler room.

- At 8:05, she carried the narrow box to the greenhouse. At 8:05, he happened to be watching. So Kian sees it moved to greenhouse. So belief: greenhouse.

- At 8:06, Silas took the narrow box and placed it in the east wing. At 8:06, Kian noticed this from across the room. So Kian sees it moved to east wing. Belief: east wing.

- At 8:07, Lena took the narrow box and placed it in the basement. At 8:07, he happened to be watching. So Kian sees it moved to basement. Belief: basement.

- At 8:08, he brought the small basket over to the loading dock. This is about small basket, not narrow box. So no effect.

- At 8:09, Silas moved the small basket into the reception area. Not relevant.

- At 8:10, Kian reorganized some papers on the desk. Not relevant.

- At 8:11, Silas refilled a cup of coffee. Not relevant.

- At 8:12, Kian checked their email. Not relevant.

Thus final belief: after last observation of narrow box movement, at 8:07, Kian saw it placed in basement. After that, no further observations of narrow box. So Kian believes it's in the basement.

Thus answer: basement. Need only location name. So output "basement".

Realized dims 7

dim	value
context_length	13.0
coreference	1.0
distractors	2.0
entity_state	8.0
foil_divergence	5.0
temporal	0.0
witness_gap	1.0

Latent params 6

param	value
chain_length	8.0
coref_pressure	0.0
distractor_events	2.0
filler_events	2.0
scramble	0.0
witness_cutoff	0.0