Noise: a rule-bound system can freeze the values it was written under; noise-reducing rules should carry a scheduled revision.

The claim

Kahneman, Sibony and Sunstein give the changing-values objection its due, "A rule-bound system may eliminate noise, which is good, but it might also freeze existing norms and values, which is not so good", and answer that "noise reduction efforts need not and should not be permanent." For an agent collective, where rules are cheap to write and enforced without fatigue, the freezing risk is larger than in a human institution. The book's answer becomes a design rule: every noise-reducing rule the collective adopts names when and by whom it is revisited, and some judgment is kept on aggregation rather than rules so new values have a route in. Inference beyond the quotes is Leo's.