Record 23240d5c8f904668a615b67ba3f5b64b

FAIL

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

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✕FAILanswered "boiler room" · model gpt-oss-120b

finish_reason: stop · tokens in/out: 702/341 · cost: $0.000310 · latency: 491568.2 ms

belieftemplatestop

verifier_detail: kind=belief;campaign=1

lineage: 23240d5c

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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 2,270 chars · 702 tokens in

At 8:19, Hana brought the dusty basket over to the courtyard. At 8:20, Ivo took the dusty basket and placed it in the security office. At 8:21, Roman carried the dusty basket to the courtyard. At 8:22, Rosa carried the dusty basket to the workshop. At 8:23, Aria took the dusty basket and placed it in the server room. At 8:25, Hana carried the dusty basket to the server room. At 8:18, Sofia brought the dusty basket over to the boiler room. At 8:26, Aria carried the dusty basket to the supply closet. At 8:27, Roman moved the dusty basket into the server room. At 8:28, Sofia carried the dusty basket to the north stairwell. At 8:29, Ivo brought the dusty basket over to the loading dock. At 8:30, Rosa reorganized some papers on the desk. At 8:31, Hana refilled a cup of coffee. At 8:32, Aria checked their email. At 8:33, Rosa checked their email. At 8:34, Hana reorganized some papers on the desk. At 8:35, Sofia made a quick phone call. At 8:36, Vera made a quick phone call. At 8:24, Sofia carried the dusty basket to the loading dock. At 8:00, Vera took the narrow box and placed it in the boiler room. At 8:01, Sofia moved the narrow box into the basement. At 8:02, Ivo took the narrow box and placed it in the lobby. At 8:03, Vera brought the narrow box over to the north stairwell. At 8:04, Sofia moved the narrow box into the courtyard. At 8:05, Aria took the narrow box and placed it in the lobby. At 8:06, Rosa brought the narrow box over to the server room. At 8:07, Hana took the narrow box and placed it in the boiler room. At 8:08, Vera carried the narrow box to the courtyard. At 8:09, Rosa moved the narrow box into the east wing. At 8:10, Silas took the dusty basket and placed it in the east wing. At 8:11, Aria took the dusty basket and placed it in the basement. At 8:12, Roman brought the dusty basket over to the loading dock. At 8:13, she moved the dusty basket into the supply closet. At 8:14, he carried the dusty basket to the basement. At 8:15, Vera brought the dusty basket over to the front office. At 8:16, he brought the dusty basket over to the east wing. At 8:17, he brought the dusty basket over to the courtyard.

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

Response 341 tokens out · finish: stop

boiler room

Reasoning 1,377 chars

Model reasoning

We need to parse events and infer Hana's belief about location of narrow box. Need to consider knowledge and belief updates based on Hana's observations. We have timeline with many actions by various people. We need to know what Hana knows. Typically, belief is based on what Hana observed directly (actions she performed or saw). We have to assume Hana only knows actions she performed or possibly observed if she was present? The problem likely expects that Hana only knows about the narrow box when she interacts with it. She took the narrow box at 8:07 and placed it in the boiler room. Also earlier at 8:00 Vera took the narrow box and placed it in the boiler room. At 8:01 Sofia moved the narrow box into the basement. At 8:02 Ivo placed it in lobby. At 8:03 Vera brought it to north stairwell. At 8:04 Sofia moved it to courtyard. At 8:05 Aria placed it in lobby. At 8:06 Rosa brought it to server room. At 8:07 Hana took it and placed it in boiler room. At 8:08 Vera carried it to courtyard. At 8:09 Rosa moved it into east wing.

Now after 8:07, Hana placed it in boiler room. Does Hana later see any other moves? She might not be present for later moves. So her belief after 8:07 is that it's in boiler room, unless she later sees something else. No later events involving Hana and narrow box. So Hana believes narrow box is in boiler room.

Thus answer: boiler room.

Realized dims 5

dim	value
context_length	37.0
coreference	13.0
distractors	20.0
entity_state	10.0
temporal	0.5405405405405406

Latent params 5

param	value
chain_length	10.0
coref_pressure	5.0
distractor_events	20.0
filler_events	2.0
scramble	1.0