Okay, that's it, I'm moving the physics and magic stuff to a different document and just linking to that, otherwise it'll cause way too much confusion. Aside from section 2, everything else in that document belongs to a different setting altogether, not the setting of this game. Sorry if it wasn't clear, but all the stuff about Pathos and what not don't apply here. You could still have a spirit that uses mind-based powers, but it'd just be called magic like any other magic, instead of being categorized as "Psionic" according to that other system. That other system is irrelevant.

Aside from that, if your spirit is on par with the rest of the major Greek gods, then it's highly unlikely for there to be anything powerful enough to inflict an indefinitely-lasting memory-blocking curse on your spirit. It's far more likely that he had a big fight against some other spirit of similar power, and his mind was damaged in the fight, resulting in his amnesia. He'd, of course, not remember who it was that he fought, and is free to come up with speculations and doubts.

Also, regarding precognition, I'm adding a clarification that it's still limited by one's reflexes, to those whom it may concern.