Why architectural diversity produces uncorrelated errors
A single model fails in predictable, repeated ways. Several models from the same family tend to fail together. Quvant starts from the opposite premise: only models built differently make independent mistakes.
The thesis: error independence isn't a detail, it's the point
If two models share architecture, data and training, they also share their blind spots: when one is confidently wrong, the other tends to be too. Polling similar models gives an illusion of consensus. Quvant deliberately picks different architectural families so their errors are uncorrelated — disagreement then becomes useful signal, not noise.
Four roles, not four opinions
Analyst
Produces the first substantive analysis of the case, making assumptions and regulatory references explicit. It is the starting point, not the final word.
Critic
Actively looks for the Analyst's mistakes: weak assumptions, logical leaps, forced regulatory references. Its job is disagreement, not agreement.
Synthesizer
Reconciles analysis and critique into a reasoned position, preserving any residual disagreement rather than hiding it.
Validator
Reviews the synthesis blind, without seeing who proposed what, and measures overall confidence. If it is insufficient, it enforces the HALT.
Why the Validator works blind
The Validator is not a fifth opinion aligned with the others. It is drawn from a different architectural family than the models that produced the analysis, critique and synthesis — precisely so its errors are independent of theirs. It works blind — it does not know which model wrote what — so it cannot inherit the groupthink of the chain before it. That independence is what makes the HALT credible: it is not a model doubting itself, but an outside reviewer with different blind spots.
HALT as designed behaviour
When the Validator's confidence drops below the 0.70 threshold, the system stops instead of answering. The HALT is recorded with the full Dissent Record, so the reader sees exactly what the models disagreed on. Stopping is not a system failure: it is the correct behaviour when the evidence isn't enough.
Quvant updates the specific models assigned to each role over time. The principle stays the same: distinct roles, different architectural families, an independent and blind Validator. That is why we do not tie the methodology to any model's version number.
See the methodology on a real case
Start an assessment and watch the four roles at work, through to a HALT with Dissent Record.