Thanks! But I didn't find a clear description there of how this works. What elevates an ordinary comment to a "community note" and what determines whether a "community note" stays up as a sort of verdict on the original post? This seems like a hard thing to get right at scale. If you rely on voting (i.e. likes or whatever), you'll just end up with a parallel comment system, no more authoritative than the original one. So there must be some other process deciding which proposed notes get this special status.
(Perhaps I should add: yes, I'm being lazy; no, I'm not being critical - I just want someone to explain this to me so I don't have to work to find out.)
Be a verified (by phone number, no need to pay) twitter user. Apply to be a Community notes contributor. Wait. If accepted, you start with 0 points. Twitter will start to show you proposed (as opposed to published) community notes. You can vote yes / no. If a note you voted yes (or no) will get enough other yes (no) votes to get published (rejected), you will get 1 point. If you voted "wrong", you will lose a point. After you have a certain number of points (I think 5), you can also write proposed notes yourself, not just vote. If your note gets rejected, you lose 5 points.
But twitter is not only counting the yes / no votes. They need people who have voted differently on some previous notes, to agree in their votes on this note, before their algorithm makes the decision to publish or reject the note.
A lot of proposed notes will never get enough votes to be decidedly published or rejected, so they will linger in the "proposed" stage forever.
