---
title: Evidence Channel
slug: evidence-channel
url: https://templeton.host/lexicon/evidence-channel/
type: defined-term
inDefinedTermSet: https://templeton.host/lexicon
author: Andrew Templeton
---

# Evidence Channel

## Definition

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 this term 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.

## See also

- [Alignment Kernels](https://templeton.host/frameworks/alignment-kernels)
- [The Deity Problem](https://templeton.host/frameworks/deity-problem)
- [Structured Elicitation](https://templeton.host/lexicon/structured-elicitation)
- [Revealed Preference](https://templeton.host/lexicon/revealed-preference)

Canonical URL: https://templeton.host/lexicon/evidence-channel/