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A comment on No, you don't need a blockchain. Parent comment

Re:No, you don't need a blockchain by ucaetano on Friday November 02, 2018 @01:23PM (#18364888)
> cryptocurrencies solve the previously unsolved double spending problem

Double-spending in digital currencies has been solved before.

Blockchain is one of the potential solutions for double spending in fully-distributed digital currencies.

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Re:No, you don't need a blockchain by swift532 on Friday November 02, 2018 @01:54PM (#18365147)
To my knowledge, not without a centralized arbiter which can then be evil, stupid, or taken over/destroyed by bad actors. Please correct me if I have the wrong info.
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