I meant Herma Mora may have been misinformed himself, though it might be silly of me to assume that just because his sphere is secrets that he wouldn't lie to manipulate mortals.
The Master of Secrets cannot be misinformed.
What may have happened, and what would seem to me like a terribly funny joke if you were Herma, is that he told the Imperial the
exact and literal truth which led him to believe something false.
Mythology is full of spirits, demons and suchlike that say what turns out to be the exact truth, only in a way that is apparent to the recepient of that truth when its too late.
The Oracle of Delphi comes to mind.