Revealing mistake: When Edward aims the rifle out of the window, you can see the cap is still on the scope. (00:40:22)
Revealing mistake: When the sheet is pulled back from Mrs. McRoberts' body at the morgue, her eyelids flutter significantly despite being dead. (00:18:30)
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