Jawbreaker (1999)

Plot hole: The whole point of the deception is that Fern Mayo, the geek, turns overnight into Vylett. No one at school has a clue about her real identity till Marcia and Courtney put up posters. So this deception carries on for several weeks before the two girls expose it. There is no way this would work. A school will not simply accept a new student without bothering to register her, yet when Fern Mayo just doesn't turn up to school one day, and Vylett does indeed, none of the teachers find this strange, or bother enrolling "Vylett" officially in school.

swordfish

Courtney: I have this gift. I can smell a lie.

Question: The whole point of the trick is to persuade the police that Liz was murdered after having sex with a random stranger. The police decide to accept this suggestion. Why do they accept this, when they know that a woman pretending to be Liz's mother called the school to say Liz wouldn't come in - ie. the police know that a woman must have been involved, yet they decide it was just a man who did it?

beckhamsfauxhawk