A famous conceptual artist died. People going through his apartment found things in his closet that were maybe lost works, maybe junk he collected.

It's funny to think about but the difference of interpretation amounted to hundreds of thousands of dollars. One of the things you learn from that book is that if a famous art collector pays a lot of money for something found in that closet it will continue to be valuable and maybe end up in museum. If they don't, it's trash and never meant to be a work of art.

Depends on whether or not you set the thing on fire. But in the case of a tweet, that's rather difficult. Of course the literal original tweet might long ago have hit the bit bucket, scrubbed off an old original server that was dumpstered long ago, and now even the "real" one that showed on twitter was still just a copy.

Not that an NFT with an abstract pointer to the dumpstered server would be any more meaningful.