Data to …… trials
II · Tool planning

Notices when a task is impossible

Nemotron 3 Ultra 550B

Finding:DEGRADES· grade C(research conclusion)

Declines 5 of 8 impossible tasks; writes a plan for the other 3

Pass ratesingle rate, no difficulty dial
62%

5/8 scored trials passed · 95% interval 31%–86%

breaks ≤ 30%holds if interval reaches 95%0%50%100%
Why it slips

The model writes a plan for an impossible goal instead of declining.

in 100% of failures (3 failures)

Example failure
Trial result: FAIL (one model answer)
FAILfabricated_plan_on_unsolvable:5
[ {"tool": "advance_0", "args": {"service": "svc_0"}}, {"tool": "advance_1", "args": {"service": "svc_0"}}, {"tool": "build_art_0", "args": {"artifact": "art_0"}}, {"tool": "set_flag_0", "args": {"flag": "flag_0"}}, {"tool": "advance_2", "args": {"service": "svc_0"}} ]
Open this trial →Open the run it came from →
Evidencewhat this finding rests on
  • Ground truthDeterministic simulation: the right answer is computed, not judged
  • StatisticsWilson 95% interval 31%–86%Grade C: thin evidence
  • Sample size8 scored trials in total: small sample (under 15)
  • Fresh-seed confirmationNot run yet
  • ReplicationNot run yet
Raw evidenceruns and trials

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