Quote:
ERICHTHONIOS
...And so there can be but one conclusion─Lahabrea was the driving force behind this chaos from the start!
THEMIS
[...]
You have met him, yes? Do you think he is capable of this?
Q1
What will you say?
A1
Lahabrea is capable of far more than you know.
A2
It's still too early to say for certain.
This seems to be the conversation you're describing but there is no third option listed here.
There are two more dialogue choices in the same quest: one when we first meet Lahabrea-actually-Hephaistos, and when Themis admits to concealing his identity as Elidibus, which seems the most likely to be a variable:
Quote:
THEMIS
As Lahabrea said, I am Elidibus, one of the Convocation and emissary of their will.
For reasons which do not involve you, it was necessary to hide my identity while investigating this place. Still, that hardly excuses my deception.
Q1
What will you say?
A1
I had a feeling.
A2
Whatever your name is, you're still Themis to me.
A3
I know a thing or two about deception myself.
The third option definitely has a ring of being a nod back to something previously, but I'm not sure what it would be. If I had to guess I would suggest Hildibrand, but I'm pretty sure I had the response option and I haven't done those quests beyond the ARR section of the storyline.