Proof-of-work is a generically interesting concept outside of blockchains. Hard-to-do/easy-to-test is a good definition of market value...
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hard to do + easy to verify is the root of p/np in cs as well
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this makes colony io task credits proof of work verified by proof of work :D
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That's an interesting analogy. But here both verifier and prover solves same problem. It is just that prover solves it many times




