Trust weight

A per-(source × domain) weight computed from the source ledger — trust is domain-contextual (an outlet strong on rates can be weak on geopolitics). Corrections move it most, corroboration least; it decays toward neutral without reinforcement. Applied when evidence enters as a bounded, clamped adjustment to the evidence score — no source becomes an oracle, none is silently zeroed (a distrusted source still surfaces, weighted near nothing, so what's ignored stays visible). The persistent counterpart to the per-item credibility judgment: "a plain web search trusts every link equally; yours doesn't" — true over time, not just per-item.

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