"I think so?"
Why is this ringing false. He can't put a finger on it at all, it just feels like - somebody else's world, held together wrong, Meritxell knows what she should say but there's no deep pattern talking, a deep pattern would have a different shape - this one is like - somebody trying to put together the shape of disturbing revelations that they think should be there -
Meritxell knows she shouldn't try to be a Keeper, on some level, that she doesn't belong in the class with Pilar and Asmodia, and is trying to be there anyways? She found revelations inside her that weren't the real revelations, the right revelations, but would prove to Keltham and herself that she could be a Keeper??
...It feels like that would be enough falsehood, at the center, to explain his feeling of falsehood???
Or he could be drawing a complete false positive on his anomaly detectors.
"Meritxell, I intuitively feel that you're in danger in the Keeper class. It's possible that some part of me still thinks Pilar and Asmodia are Trope Girls and you're not one and only Trope Girls can do this safely, it's possible that some other part of me knows something that it's having trouble making fully clear to me."
"This could be a bad idea and could end up with you in Hell, but assuming you don't want to otherwise never get an Owl's Wisdom again, one of the thoughts that occurs to me, is that you could take an Owl's Wisdom and focus specifically on why you want to be a Keeper and whether that's smart for you."