This claim is repeated often in /r/Bitcoin without any facts to back it up. I work on blockchains every day, and I disagree. Blockchains provide a mechanism for

This claim is repeated often in /r/Bitcoin without any facts to back it up. I work on blockchains every day, and I disagree. Blockchains provide a mechanism for parties to agree on a transaction history that no party can retroactively alter without detection. No one can execute a transaction without the agreement of the validators. Traditional databases don't have these benefits.