He normally calls him Danny, but he also calls him Daniel on a couple of occasions. (I just went through some of the transcripts to make sure.) I figured since it was a fairly serious conversation, I'd go with the full name. (It's pretty interesting, actually; I don't think Isaac ever calls Dan 'Dan'. I think perhaps Isaac is more of a father figure to Dan than his actual father.)

Thank you, though! "Speaking Sorkin" is, again, one of the highest compliments around. (Without the bad crack, of course. =P)