"I truly don't know. Whatever is going on with these entities and the Singularity, there may be a reason we cannot see ourselves. There are plenty of mysteries left in this continent."

They can speculate and come up with some guesses that could definitely be correct, but they also could be wrong. Istredd wouldn't say he was frustrated by the lack of answers, because he hasn't been here long enough to say he's searched wide and far enough. The frustration would come in more that they're so limited in scope in Thorne. He's searched for answers for decades and will continue to for centuries.

"You did say that you thought perhaps it being a temple. And mine, while not a temple, does have to do with symbolic importance. The Singularity has never shown interest in mine before so ... it must be more to do with what's happening right now."

Such as the gods.