There's a wave of relief at that, as well as some chagrin at having doubted Ben. (He's getting used to that concept, it seems--it's hard not to, with the man next to him and his presence in the Force a familiar comfort, even if the image is utterly wrong. Fascinatingly so.) So he smiles gratefully, nodding.

He squints up at the other man as he falters over R2's name, and his eyebrows raise. "You did know him!" he says, a trifle indignant, though in the grand scheme of things it's a lesser lie than others Kenobi fostered. It's one part of the mystery he's never pried from R2's memory banks--why the droid had said he'd been owned by Obi-Wan Kenobi.