Dæmonicus - S9-E3
Revealing mistake: At the very beginning of the episode, we see the reflection of the Moon in a puddle. The Moon looks exactly as we see it in the sky. The problem is that in the puddle we should see the mirror image of the Moon. (00:00:05)
Trust No 1 - S9-E6
Revealing mistake: When Agent Reyes drives up to Agent Dogget's parked car, he looks in his rearview mirror. Its background should be obviously a transparent windshield to which the mirror is fixed. However, when the camera shows the image seen in the rearview mirror, we see in the background something similar in appearance to a solid wall. (00:10:50)
Trust No 1 - S9-E6
Revealing mistake: When Doggett visits Scully in Quantico and interrupts her pathology class, the cadaver left on the table blinks his eyes at least twice. (00:28:25)
Improbable - S9-E13
Revealing mistake: When Scully is examining the body of Vicky Louise Burdick, the dead woman moves her eyeballs. (00:22:50)
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