"You're right. Well, I'll... I'll think about it," he says. Because he has no idea what he'd even say to Robin. Demand answers? To what questions?

The thing about being left out in the dark with a bunch of obstacles to overcome just to survive is that he didn't have the luxury of time or resources to look into other things.

Well, he supposes, they'll have to figure something out. And he has a whole day of walking to do so.