Via Negativa - S8-E7
Revealing mistake: When Doggett examines in the car the body of Agent James Leeds, the carotid artery of the victim is pulsating. (00:05:40)
Via Negativa - S8-E7
Continuity mistake: At The Beginning of the scene, there is only what seems to be a remote control on the left-hand side of the TV. Five seconds later, a couple of VHS tape cases appear where the remote control was before. (00:08:46)
Via Negativa - S8-E7
Continuity mistake: When Doggett and Skinner visit Dr. Andre Bormanis at his place, in the first shot from the back he is leaning over some laboratory gear that is holding in his hands, while in the next front shot he is standing upright manipulating on the table with his hands. (00:18:10)
Via Negativa - S8-E7
Continuity mistake: When Doggett leaves his office, he reaches for his coat, grabs it and starts to put it on. In the next shot, when Langly, Frohike, and Byers look in Doggett's direction, we again see that he takes the coat off from the chair. (00:27:55)
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