[ There is so much about that he wants to call bullshit on. Really, really wants to. But it's pretty obvious even to him that this guy at least believes what he's saying. And there's something more important... ]
How'd you know Merlin? Is he here? How 'bout R-- ... Lancelot?
[ Use of their codenames has definitely been sporadic, but he knows Merlin would skin him alive if he heard he'd been giving out their real names somewhere like this. ]