Record 46ed2f5a380d4338b286f38f4801a4b3

FAIL

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

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✕FAILanswered "loading dock" · model gpt-oss-120b

finish_reason: stop · tokens in/out: 704/550 · cost: $0.000436 · latency: 9969.7 ms

belieftemplatestop

verifier_detail: kind=belief;campaign=1

lineage: 46ed2f5a

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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 2,254 chars · 704 tokens in

At 8:00, Roman brought the small box over to the wine cellar. At 8:01, Piers moved the small box into the loading dock. At 8:02, Maya took the small box and placed it in the wine cellar. At 8:03, Roman brought the small box over to the greenhouse. At 8:04, she moved the small box into the utility closet. At 8:05, he took the small box and placed it in the wine cellar. At 8:06, Sana brought the small box over to the observation deck. At 8:07, Cyrus brought the small box over to the storage room. At 8:08, Roman carried the small box to the wine cellar. At 8:09, Maya took the small box and placed it in the cafeteria. At 8:10, he moved the faded box into the east wing. At 8:11, Cyrus moved the faded box into the loading dock. At 8:12, Sana moved the faded box into the courtyard. At 8:13, Victor brought the faded box over to the utility closet. At 8:14, he brought the faded box over to the north stairwell. At 8:15, Kian brought the faded box over to the courtyard. At 8:16, Sana moved the faded box into the meditation room. At 8:17, Cyrus moved the faded box into the storage room. At 8:18, she moved the faded box into the courtyard. At 8:19, Roman carried the faded box to the meditation room. At 8:20, she carried the faded box to the observation deck. At 8:21, Marcus moved the faded box into the wine cellar. At 8:22, she brought the faded box over to the cafeteria. At 8:23, she took the faded box and placed it in the north stairwell. At 8:24, Victor took the faded box and placed it in the courtyard. At 8:25, Cyrus took the faded box and placed it in the loading dock. At 8:26, Piers carried the faded box to the north stairwell. At 8:27, Victor took the faded box and placed it in the east wing. At 8:28, Piers brought the faded box over to the wine cellar. At 8:29, Kian brought the faded box over to the observation deck. At 8:30, Sana reorganized some papers on the desk. At 8:31, Cyrus refilled a cup of coffee. At 8:32, he checked their email. At 8:33, Kian checked their email. At 8:34, Roman reorganized some papers on the desk. At 8:35, Piers made a quick phone call. At 8:36, Marcus made a quick phone call.

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

Response 550 tokens out · finish: stop

loading dock

Reasoning 2,268 chars

Model reasoning

We need to infer belief of Piers about location of small box based on events and possibly knowledge about others' actions and Piers' perspective. This is a classic belief tracking problem. We have timeline of actions. Need to consider what Piers knows. Usually, unless specified, agents have perfect perception of events they witness? Not given. Might assume each person only knows actions they performed or observed? The problem likely expects that Piers' belief is based on his last known action regarding the small box. Let's track small box movements:

Timeline small box:

8:00 Roman -> wine cellar
8:01 Piers moved small box into loading dock. So Piers knows it's now in loading dock (he moved it).
8:02 Maya -> wine cellar
8:03 Roman -> greenhouse
8:04 she (who? "she" refers to Maya? Actually after 8:03 Roman, "she moved the small box into the utility closet." Who is "she"? The previous subject was Roman (he). But "she" likely refers to Maya? Let's parse: 8:03 Roman brought the small box over to the greenhouse. 8:04, she moved the small box into the utility closet. The pronoun likely refers to Maya (the last female mentioned). So Maya moved it to utility closet.
8:05 he (Roman) took the small box and placed it in the wine cellar.
8:06 Sana -> observation deck
8:07 Cyrus -> storage room
8:08 Roman -> wine cellar
8:09 Maya -> cafeteria
8:10 he moved the faded box... (not small box)
From 8:10 onward, small box not mentioned until maybe later? No more small box mentions after 8:09. So last action on small box is at 8:09 Maya placed it in cafeteria.

Thus the actual location is cafeteria.

Now, what does Piers believe? Piers last interacted with small box at 8:01 moving it to loading dock. After that, he may not have observed subsequent moves. Did Piers have any later observations? At 8:35 Piers made a quick phone call (no info). No other mention of Piers seeing small box moves. So Piers likely believes it's still in loading dock (the location he last placed it). Unless he observed others moving it later, but not indicated.

Thus answer: loading dock.

Check pronouns: At 8:01, Piers moved the small box into the loading dock. So Piers knows that. No later info about him seeing others. So belief = loading dock.

Thus answer: loading dock.

Realized dims 5

dim	value
context_length	37.0
coreference	16.0
distractors	20.0
entity_state	10.0
temporal	0.0

Latent params 5

param	value
chain_length	10.0
coref_pressure	5.0
distractor_events	20.0
filler_events	2.0
scramble	0.0