Oracles and Advocates.

The simplest oracles are the feeds of cryptographically verifiable financial data, which are already being put on-chain.

The simplest advocates are posts that cite these oracles by directly linking block explorer entries.

Example: http://feeds.chain.link 
A more complex advocate may take a price oracle feed, do some calculations, and render the results as charts in an article.

Importantly, if published via reproducible research, a reader could individually verify every assertion, drilling all the way down to raw on-chain entries.
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