[robjan]

Doesn't that mean that in the future Jack can just mint a new NFT and say that the new one is in fact the canonical NFT for his first tweet? The only way to do it would be for NFTs to support non-repudation, but they don't.

The trust layer is in the physical world either based on hearsay or a physical contract with two parties. In any case, it's off-chain.

[Hjfrf]

I can sell Jack's tweet right now.

That's a bigger issue than Jack being able to sell it multiple times.

[capableweb]

You can. Is it the same? No.

Just as it's not the same if a random person tries to sell movie props from famous movies, compared to if the person actually being in that production in the first place.

[goblin89]

What? If they sell verifiably the same physical prop, then what's the difference?

Jack's tweet doesn't become counterfeit if Hjfrf sells it, it's non-figuratively and verifiably the same exact tweet.

[robjan]

The NFT representing Jack's tweet is a pointer to the tweet. It's possible to create an unlimited number of pointers to the same thing.