Within (1) - S8-E1
Continuity mistake: When Scully points out the location of the last time they saw Gibson Praise, she points to the (real) Palo Verde Nuclear Plant, which is west of Phoenix. In 'The Beginning' the plant shown was the (fictional) Rolling Hills Nuclear Plant, 60 miles east of Phoenix. (00:37:30)
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