Evidence Channel
A typed pipe with one source of truth and one destination posterior - preference evidence (tournaments, keep/drop verdicts) updates only the preference posterior; realized outcomes (the thing that shipped, then what happened) update only the reality posterior. Disjoint by construction; nothing else gets the wrong key.
Why It Exists
A single quality score collapses preference and reality into one latent and makes the most diagnostic divergence in the system - is the proxy being gamed or just stale? - literally unstateable. Channeled evidence is the type discipline that keeps the two questions answerable.
Related Terms
Structured Elicitation - A controlled experiment designed to learn the operator's preferences.
Revealed Preference - Inferring the operator's preferences by watching what they actually do - not what they say they want.