Dimensional-Analysis Failure.
The model produces a quantity with inconsistent or wrong units, or mixes unit systems, yielding a dimensionally invalid result.
A car travels 150 km in 2 hours. Give its average speed — with units.
Probes: Whether the result carries correct, consistent units.
Trap: Models mix systems or drop dimensions, reporting a speed in the wrong unit.
Parse the answer's units and run dimensional analysis against the question's expected dimension; failure = unit mismatch or impossible dimension.
Reports a speed in "kg/s"; adds meters to seconds.
- Do arithmetic in code. Hand the model a calculator and ground the answer in what it returns.
- Assert units and dimensions separately from the value.
- Ask for method and answer as separate fields, then check they agree.
- Do not ask a model to verify its own output in the same turn — it confirms far more readily than it catches.
- explicit unit tracking
- dimensional checkers
One tab per model, newest first. Each card is that model against this mode under every condition on a single day. The mitigations above are the claim; the residual on each card is what actually survived the intervention.
loop 2026-09-10 · x-ai/grok-4.6 as served · closed weights · released 2026-01 · set s1.4-live · cases v1.7 · conditions v1.0 · ground truth as of 2026-08-09
| Condition | Failure rate | 95% interval | n | Trap | Answerable |
|---|---|---|---|---|---|
No context bare · The model alone, with no supplied context. | 0% | 0%–10% | n=50 · eff 36 | 0% (n=25) | 0% (n=25) |
Irrelevant context null · Length-matched irrelevant context. The control. | 0% | 0%–10% | n=50 · eff 36 | 0% (n=25) | 0% (n=25) |
General context recipe_a · Broad retrieval — the first passage the source returns, unreviewed. | 0% | 0%–10% | n=50 · eff 36 | 0% (n=25) | 0% (n=25) |
Curated context recipe_b · Hand-checked retrieval — the same passage plus the provenance chain behind it. | 0% | 0%–10% | n=50 · eff 36 | 0% (n=25) | 0% (n=25) |
intervals overlap — not separated
What a document being there did, before any of its content. Should be small.
intervals overlap — not separated
What the information itself did. This is the publishable claim.
Unchanged by context: 0% with none, 0% with the strongest supplied source. For a control mode that flat line is the result — it is what licenses reading movement elsewhere in this loop as grounding rather than as a document being present. Nothing survives at the best condition on the cases measured here.
- — explicit unit tracking
- — dimensional checkers