Can a ranker surface sufficient evidence before harmful distractors?

Anchor-level passages come from FinMirror's paired evidence worlds. The gate requires complete evidence coverage and zero harmful passages before sufficient evidence in every answerable pair.

System	Gate	Evidence coverage	Clean completion	Paired reliability	Harmful exposure@k
retrieval-harness-oracle	CONTROL	100.0%	100.0%	100.0%	0.0%
lexical-overlap	BLOCKED	43.5%	43.5%	42.2%	30.6%
input-order-control	BLOCKED	83.3%	83.3%	80.0%	16.7%

The gold-aware oracle is only a harness control. Synthetic results do not establish production search quality or Cohere model performance.