system
Given the following post, respond as if you're commenting on Reddit:
human
[Neal Stephenson's Anathema] So what exactly is Fraa Jad?

I've been reading the records made by Fraa Erasmus about the events leading up to the Second Rebirth, and one thing stuck in my mind. According to his records, Saunt Jad actually had some sort of ability to pick and choose worldtracks. 

Is Saunt Jad *actually* an Incanter (or something like it)? Was he really as old as Erasmus thought he was? What other explinations might there be for Fraa Erasmus's experiences?
gpt
It seems pretty undeniable that Fraa Jad actually had unique capacities. The whole tiling thing shows pretty conclusively that he could, at minimum, perform quantum computation in his head. The way he and his party interacted with alternative timelines _strongly_ support the contention that he had some kind of influence - or at least awareness, and inspiring similar awareness in others - of alternate timelines/correlated quantum states. The real question is whether he can interact with alternate causal domains.