Revealing mistake: When Scully grabs Mulder's hand, his watch shows 11:25 AM, but when the agents enter the house, the scene's stamp reads "Phoenix, Arizona, 4:58 PM." (00:17:55)
Revealing mistake: When Mulder - whilst trapped in the body of Morris Fletcher - is doing various poses in front of the mirror, several of his movements and the corresponding movements from the realized reflection of Morris Fletcher are slightly out of sync with each other.
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