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Storage proofs, and the retrieval they do not include.
The 2017 Filecoin paper is a market for storage with proofs. The 2014 sketch in the historic library is a different document. Cite the one you read.
Keep the documents apart
Proof of replication is not a service-level agreement. Compute markets and wireless coverage markets have the same shape: a measurable stand-in, then a customer who may not exist.