When moving to another mail provider, I can forward mails going to the old address to the new one.
You’re assuming that the reason for the move is not the old mail provider shutting down. If the old provider shuts down and you cannot somehow get their domain name, all mails sent to your old address will just vanish in the void (or even worse, be gobbled up by whoever owns the domain now, better hope there’s no personal info in there that you wouldn’t want in their hands).
Do we have a AI with a theory of mind or just a AI that answers the questions in the test correctly?
Now whether or not there is a difference between those two things is more of a philosophical debate. But assuming there is a difference, I would argue it’s the latter. It has likely seen many similar examples during training (the prompts are in the article you linked, it’s not unlikely to have similar texts in a web-scraped training set) and even if not, it’s not that difficult to extrapolate those answers from the many texts it must’ve read where a character was surprised at an item missing that that character didn’t see being stolen.