[linklonk]

It seems like they distinguish between "recommendation making" vs "verifying correctness of content" and Credence is meant to solve the latter: "Since Credence is not a recommendation system, your thumbs-up and thumbs-down decisions should be based on an objective evaluation of whether a file's description matches its contents, not on matters of taste." https://www.cs.cornell.edu/people/egs/credence/faq.html