Is Twitter a public ledger?

One of the hallmarks of blockchains is that they are public ledgers. The record of which wallets have which tokens is available for all to see on Bitcoin, Ethereum and anywhere else. You may not know who actually owns the wallets but there is a record there. Which brings me to Twitter. Twitter is a public record of messages associated with an account. You don’t know for sure who owns an account (unless they are verified) but you know that the account has given permission for certain messages to be listed in the ledger. Unlike blockchains, those messages are revocable from the ledger itself. But like blockchains, any message that was once part of the ledger can usually be recovered and so it is hard to remove messages completely once they have been public. Which brings me to Elon Musk. In one of the many statements he made upon agreeing to buy Twitter, Musk wrote: <blockquote> I also want to make Twitter better than ever by enhancing the product with new features, making the algorithms open source to increase trust, defeating the spam bots, and authenticating all humans. </blockquote> The key phrase is “authenticating all humans.” That could actually mean pretty much anything so I am going to do what any sensible commentator would do in this situation which is to write what I think that means, why it is valuable and, therefore, assert that this is what Musk has in his mind all along. Which brings me to Paul Graham. Graham was the founder of Y-combinator and wrote a very short essay in 2009 on<a href="http://www.paulgraham.com/twitter.html" rel="noopener ugc nofollow" target="_blank"> “why Twitter is a big deal.”</a> Here is most of it: <a href="https://joshgans.medium.com/is-twitter-a-public-ledger-5257e1064926">Learn More</a>