Corrected entry: Towards the end of the episode, Lisa calls Mr. Skinner "Principal Tanzarian". However, at the end of the episode "The Principal and the Pauper", Judge Schneider declares that anyone who ever mentions the fact that he's not the real Seymour Skinner ever again is to be punished... "by penalty of torture". May I do the honours, Judge?
Corrected entry: Bart asks Lisa how she knows so much about the Talmud. She credits her imaginary Jewish friend. But Bart was with Lisa in episode 3-6: "Like Father, Like Clown," when she made an extensive study of ancient Jewish texts. So Bart shouldn't need to ask the question in the first place, and Lisa's answer is incorrect, or at least incomplete.
Corrected entry: Throughout the episode, Chief Wiggum acts rather dilligently in his attempts to track down and capture Mona Simpson. But when Mona first appeared (7-8: Mother Simpson), Chief Wiggum was the one who tipped her off and enabled her to escape. He was grateful to Mona because her break-in at the germ warfare lab inadvertently cured his asthma.