Fight Club - S7-E20
Continuity mistake: Scully tells Burt that Betty lived in a blue house and later tells Mulder that she found Lulu, who lived in a pink house. Betty actually lived in the pink house and Lulu lived in the blue one. (00:00:30 - 00:13:25)
Answer: As he stated many times throughout the series, Mulder needed Scully to be sober and skeptical. Whenever Scully's skepticism wavered and she started questioning her own rationality, Mulder would try to restore her sense of skepticism, because he needed her to be clear-thinking.
Charles Austin Miller