"...It'll do the same thing up there as it did down here."

You know. The horribly mutated wandering murderers. You might have noticed them.

He says it like he's expecting Sinclair to contradict him, though. And not because he's a walking contradiction himself. It's because -- well, people are sensible, right? They do things that are best for them. Living in a world full of splicers doesn't seem to be what's best for Sinclair.