It's not a surprise to hear what Nick's world is like considering that that there are 'raiders' out an about. But it does pique his curiosity. "Post-war? What was the war about?" He frowns a little, trying to puzzle out the synth's role in all of this. "I'd like to know about your origins, but before you think I'm an asshole for asking, you should know that I'm a robot, too. A Cylon. It's why I'm curious."

Solidarity in artificiality, and all that.

He doesn't know what a vault is, but it's not relevant to the story. "Wait, what? Was the kid aged up or was your friend stuck in time somehow? Either way, that's a lot of crap for one man to deal with. He could have decided to just give up doing the right thing, if that's what he ended up with."