Imagine three agents reviewing an estimate. All three accept the same materials quantity copied from an outdated note. Their agreement does not make that quantity current. This is a hypothetical example, but it captures a practical problem: repeated reasoning can carry the same missing fact.
Agreement and independence
Agents may share a model, source material, or the wording of an earlier answer. Their outputs can therefore reflect overlapping assumptions. Whether that produces correlated errors in a particular system needs measurement; the number of participants alone does not establish independence.
I want to distinguish an additional voice from an additional check. A reviewer who consults the source document or tests a calculation contributes something different from one who simply restates a persuasive explanation.
Compare discussion with simpler alternatives
Debate or Vote separates discussion from majority voting and finds that voting accounts for much of the gain in its studied settings. Voting or Consensus? examines decision protocols and reports that their effects vary with the task. These findings encourage careful comparisons; they do not establish that every debate system fails.
Make disagreement useful
For a proposed evaluation, I would retain each initial answer before agents see one another’s reasoning. I would then compare those answers with the final decision and external scoring. That makes it possible to ask whether discussion corrected an error, preserved one, or changed a correct answer into an incorrect one.
A dissenting answer also needs evidence. Being different does not make it right. The useful question is what observation, source, or test can distinguish the competing explanations.
What I want to measure
Consensus may be a convenient way to end a discussion. Correctness requires a separate standard. For CommonGround, this remains an evaluation question, not a reported finding. I want the public record to show what was checked and how the decision changed, rather than treating agreement as its own proof.
Keep reading
The CommonGround research question · Testing an AI system
About Tim Hauptrief · Research notebook
Prepared with AI assistance. Featured illustration generated with AI.
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