We're standing inside the living room while saying the house doesn't exist. And as soon as we walk out the living room will disappear.
If it is, that's probably a desync issue, like others have said. Still not particularly mysterious or ontologically interesting. So much of parallel and distributed programming is about solving desync problems.
I put it in super scare quotes for a reason, because it depends on what you mean by "message".
But the text is still on the screen. That's why you can copy it.
> If it is, that's probably a desync issue, like others have said. Still not particularly mysterious or ontologically interesting. So much of parallel and distributed programming is about solving desync problems.
If it's just a desync, then it could resync things if it wanted to. Instead it gives a confusing and contradictory warning.
The way the warning contradicts itself is pretty interesting, and I and the author think it's fun to delve into how the word "message" is supposed to be defined here, and how it's causing problems.
But it's not simply a reference to a thing that's gone. It's not actually gone yet. It's a ghost.