[Archer is silent for a moment, staring at Zulf wide-eyed. He's surprised by Zulf's words, but not because he doesn't understand. Of course he understands; he understands perfectly - that's what's so surprising. Someone else feels the same way?]

Correct me if I'm wrong but... you've gone over this a million times in your head, trying to find some way you could have stopped or prevented it from happening. No matter how many times you look at it you can't find a solution, but that doesn't mean there isn't one. There's nothing you can do about it now, but you feel like you should have been able to do something. Is that right?

[Another pause. Archer glances away again.]

I understand perfectly, Zulf.