That sounds a lot like 'I don't know either' but if so he's not going to press the point and maybe embarrass her.
"Most people who aren't sparks and live up until their thirties have been filtered to either have some form of sanity that let them stay alive, or some form of madness. I like to think I'm in the first group, and so are a number of the other town guards, because the problems we face aren't easily survived by being insane. A few months, maybe, but not years."
"Were you serious about wanting to hear about our work and the problems we face?"