The world is safe because Aradia is not laughed at, even if it means he doesn't even focus back in when Clara speaks. The question is directed at Ghost Girl, but who cares. It doesn't change the fact the word 'anchors' is picked up on. The moment of silence in between their silent stares is an immediate snap to so long ago.

Everyone went through the courses after induction. They weren't long or particularly helpful, since the point was to just give the minimum assistance (death weeds out the weaker ones, why bother investing in disposable statistics) and after it they would all pick their specification. Being an Exorcist is for scrubs and weenie babies and living shields, screw that noise time to take specialization with the witch hunters.

The point is he does remember a section on ghosts he essentially ignored because, really, he's not doing that. Ever. The monotone stays intact, reading off some mental lecture and only taking out the important bits.

"That's th'one that leeches off the victim's soul, right?"

And now everyone can be totally unsurprised that the jesus cultists are given completely not-false information to make them more efficient. Super unsurprised. None of us are wrong, after all.