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Record f069dcce0bc14160a729ed775acf769c

FAIL

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

✕FAILanswered "south stairwell" · model Nemotron 3 Nano 30B

finish_reason: stop · tokens in/out: 392/1133 · cost: $0.000246 · latency: 12406.3 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: f069dcce

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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 1,275 chars · 392 tokens in
At 8:00, Wren carried the narrow basket to the archive room. At 8:01, Oscar moved the narrow basket into the meditation room. At 8:01, she was nearby and saw this happen. At 8:02, she moved the narrow basket into the west wing. At 8:03, she carried the narrow basket to the south stairwell. At 8:04, Adrian took the narrow basket and placed it in the archive room. At 8:04, she was nearby and saw this happen. At 8:05, Oscar brought the narrow basket over to the west wing. At 8:05, she happened to be watching. At 8:06, Adrian took the narrow basket and placed it in the south stairwell. At 8:06, she noticed this from across the room. At 8:07, he carried the narrow basket to the north stairwell. At 8:07, she happened to be watching. At 8:08, Oscar brought the narrow basket over to the lobby. At 8:08, she was nearby and saw this happen. At 8:09, he carried the narrow basket to the south stairwell. At 8:10, he carried the blue box to the south stairwell. At 8:11, Adrian took the blue box and placed it in the archive room. At 8:12, he reorganized some papers on the desk. At 8:13, Oscar refilled a cup of coffee. At 8:14, Wren checked their email.

Where does Wren believe the narrow basket is? Answer with only the location name (or 'unknown' if they have no belief).
Response 1,133 tokens out · finish: stop
south stairwell
Reasoning 4,197 chars
Model reasoning
We need to infer Wren's belief about where the narrow basket is, based on observations timeline. Let's parse events.

We have multiple actors: Wren, Oscar, Adrian. The basket is "narrow basket". Timeline:

- 8:00: Wren carried the narrow basket to the archive room. So at 8:00, Wren moves basket to archive room. She presumably knows it's there.

- 8:01: Oscar moved the narrow basket into the meditation room. At 8:01, she was nearby and saw this happen. So Wren sees Oscar move basket from archive? Actually earlier Wren placed it in archive at 8:00. At 8:01 Oscar moves it to meditation room. Wren sees this.

- 8:02: she moved the narrow basket into the west wing. So Wren moves basket to west wing at 8:02. She presumably knows location.

- 8:03: she carried the narrow basket to the south stairwell. So at 8:03, Wren moves basket to south stairwell.

- 8:04: Adrian took the narrow basket and placed it in the archive room. At 8:04, she was nearby and saw this happen. So at 8:04, Adrian takes basket (presumably from wherever it was? At that moment, where is basket? It was at south stairwell at 8:03, but maybe Adrian took it from there? Actually timeline: At 8:03, Wren carried basket to south stairwell. At 8:04, Adrian took the narrow basket and placed it in the archive room. She (Wren) sees this happen. So Wren sees Adrian taking basket (maybe from south stairwell?) and placing it in archive room. So after 8:04, Wren believes basket is in archive room (since she saw Adrian place it there). However later events may affect her belief.

- 8:05: Oscar brought the narrow basket over to the west wing. At 8:05, she happened to be watching. So Wren sees Oscar bring basket to west wing. But where is basket at that time? According to previous, Adrian placed it in archive at 8:04. But maybe Adrian placed it there, but then Oscar later brings it to west wing? Actually timeline: At 8:05, Oscar brings the narrow basket over to the west wing. Wren is watching. So she sees basket being moved to west wing. So she updates belief: basket is now in west wing.

- 8:06: Adrian took the narrow basket and placed it in the south stairwell. At 8:06, she noticed this from across the room. So Wren sees Adrian take basket (presumably from west wing?) and place it in south stairwell. So she sees it go to south stairwell. So she believes basket is now in south stairwell.

- 8:07: he carried the narrow basket to the north stairwell. At 8:07, she happened to be watching. So Wren sees Adrian move basket from south stairwell to north stairwell. So she believes basket is now in north stairwell.

- 8:08: Oscar brought the narrow basket over to the lobby. At 8:08, she was nearby and saw this happen. So Wren sees Oscar bring basket to lobby. So she believes basket is now in lobby.

- 8:09: he carried the narrow basket to the south stairwell. At 8:09, he carried the narrow basket to the south stairwell. (Who is "he"? Probably Adrian again). At 8:09, she noticed this from across the room. So Wren sees basket moved to south stairwell again. So she believes basket is now in south stairwell.

- 8:10: he carried the blue box to the south stairwell. This is about a blue box, not basket.

- 8:11: Adrian took the blue box and placed it in the archive room. Not relevant.

- 8:12: he reorganized some papers on the desk. Not relevant.

- 8:13: Oscar refilled a cup of coffee. Not relevant.

- 8:14: Wren checked their email. Not relevant.

Thus, Wren's belief about location of narrow basket evolves as she observes moves. At the end (presumably at 8:14 when she checks email), what does she believe? She has observed the latest move: at 8:09, basket moved to south stairwell. After that, no further moves of basket are described. So she believes it's in the south stairwell.

But need to consider that at 8:08 she saw Oscar bring it to lobby, then at 8:09 it was carried to south stairwell. So she saw it go to south stairwell at 8:09. So her belief at 8:14 is that it's in the south stairwell.

Thus answer: south stairwell. However need to check if any ambiguity: Did she see the basket being moved to south stairwell at 8:09? Yes. So she believes it's there.

Thus answer: south stairwell.
Realized dims 7
dimvalue
context_length15.0
coreference1.0
distractors2.0
entity_state10.0
foil_divergence5.0
temporal0.0
witness_gap1.0
Latent params 6
paramvalue
chain_length10.0
coref_pressure0.0
distractor_events2.0
filler_events2.0
scramble0.0
witness_cutoff0.0