Continuity mistake: During the conversation with Mulder, in the front shot the Deep Throat tilts his head to the left while in the back shot his head is tilted to the right. (00:26:10)
Continuity mistake: When we watch Scully typing from behind, the text she types is ahead of the text we saw at a distance in the previous shot. (00:15:15)
Continuity mistake: When Scully gets out of the car, it is parked much closer to the curb than in the previous shot. (00:30:35)
Answer: He was being facetious. He doesn't specifically know that information, he was merely giving examples of the types of information he has access to.
I think so too.
lionhead