[threeseed]

> Don’t get me wrong, it’s a hard problem, they just seem like different classes of problems

Time travel. Teleportation through quantum entanglement. Intergalactic travel through wormholes.

And don't get me wrong they are hard. But just another class of problems. Right ?

[CooCooCaCha]

Yes absolutely. I have a (supposedly) working brain in my head right now. But so far there are no working examples of the things you listed.