What’s your best argument for why data should be onchain? 

A network of technologists & journalists supporting digital public infrastructure for /journalism & media | https://journodao.xyz/

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I think for certain purposes, it can help to have authorship/provenance of content be publicly queryable. 

I know DeSciWorld is working on this in the context of semantic publishing, and we at @journodao are working on it in the context of censorship-resistant publishing for journalists.